[pLog-svn] r5685 - in plog/trunk/class: . data/utf8 data/utf8/mbstring data/utf8/native data/utf8/utils

oscar at devel.lifetype.net oscar at devel.lifetype.net
Thu Jul 19 14:22:10 EDT 2007


Author: oscar
Date: 2007-07-19 14:22:10 -0400 (Thu, 19 Jul 2007)
New Revision: 5685

Added:
   plog/trunk/class/data/utf8/mbstring/
   plog/trunk/class/data/utf8/mbstring/core.php
   plog/trunk/class/data/utf8/native/
   plog/trunk/class/data/utf8/native/core.php
   plog/trunk/class/data/utf8/ord.php
   plog/trunk/class/data/utf8/str_ireplace.php
   plog/trunk/class/data/utf8/str_pad.php
   plog/trunk/class/data/utf8/str_split.php
   plog/trunk/class/data/utf8/strcasecmp.php
   plog/trunk/class/data/utf8/strcspn.php
   plog/trunk/class/data/utf8/stristr.php
   plog/trunk/class/data/utf8/strrev.php
   plog/trunk/class/data/utf8/strspn.php
   plog/trunk/class/data/utf8/substr_replace.php
   plog/trunk/class/data/utf8/trim.php
   plog/trunk/class/data/utf8/ucfirst.php
   plog/trunk/class/data/utf8/ucwords.php
   plog/trunk/class/data/utf8/utf8.php
   plog/trunk/class/data/utf8/utils/
   plog/trunk/class/data/utf8/utils/ascii.php
   plog/trunk/class/data/utf8/utils/bad.php
   plog/trunk/class/data/utf8/utils/patterns.php
   plog/trunk/class/data/utf8/utils/position.php
   plog/trunk/class/data/utf8/utils/specials.php
   plog/trunk/class/data/utf8/utils/unicode.php
   plog/trunk/class/data/utf8/utils/validation.php
Modified:
   plog/trunk/class/bootstrap.php
Log:
Added the code from the php utf-8 library, which reimplements utf-8 versions of most string handling methods in php (utf8_strlen, utf8_trim, etc) I think we're going to need these... I've also modified the bootstrap file to make sure that they're automatically loaded.


Modified: plog/trunk/class/bootstrap.php
===================================================================
--- plog/trunk/class/bootstrap.php	2007-07-19 18:14:47 UTC (rev 5684)
+++ plog/trunk/class/bootstrap.php	2007-07-19 18:22:10 UTC (rev 5685)
@@ -28,4 +28,7 @@
 	    
     // for performance logging purposes
     lt_include( PLOG_CLASS_PATH."class/misc/info.class.php" );    
+
+	// replacement code for the UTF-8 libraries in case they are not installed
+	lt_include( PLOG_CLASS_PATH."class/data/utf8/utf8.php" );
 ?>
\ No newline at end of file

Added: plog/trunk/class/data/utf8/mbstring/core.php
===================================================================
--- plog/trunk/class/data/utf8/mbstring/core.php	                        (rev 0)
+++ plog/trunk/class/data/utf8/mbstring/core.php	2007-07-19 18:22:10 UTC (rev 5685)
@@ -0,0 +1,140 @@
+<?php
+/**
+* @version $Id: core.php,v 1.5 2006/02/28 22:12:25 harryf Exp $
+* @package utf8
+* @subpackage strings
+*/
+
+/**
+* Define UTF8_CORE as required
+*/
+if ( !defined('UTF8_CORE') ) {
+    define('UTF8_CORE',TRUE);
+}
+
+//--------------------------------------------------------------------
+/**
+* Wrapper round mb_strlen
+* Assumes you have mb_internal_encoding to UTF-8 already
+* Note: this function does not count bad bytes in the string - these
+* are simply ignored
+* @param string UTF-8 string
+* @return int number of UTF-8 characters in string
+* @package utf8
+* @subpackage strings
+*/
+function utf8_strlen($str){
+    return mb_strlen($str);
+}
+
+
+//--------------------------------------------------------------------
+/**
+* Assumes mbstring internal encoding is set to UTF-8
+* Wrapper around mb_strpos
+* Find position of first occurrence of a string
+* @param string haystack
+* @param string needle (you should validate this with utf8_is_valid)
+* @param integer offset in characters (from left)
+* @return mixed integer position or FALSE on failure
+* @package utf8
+* @subpackage strings
+*/
+function utf8_strpos($str, $search, $offset = FALSE){
+    if ( $offset === FALSE ) {
+        return mb_strpos($str, $search);
+    } else {
+        return mb_strpos($str, $search, $offset);
+    }
+}
+
+//--------------------------------------------------------------------
+/**
+* Assumes mbstring internal encoding is set to UTF-8
+* Wrapper around mb_strrpos
+* Find position of last occurrence of a char in a string
+* @param string haystack
+* @param string needle (you should validate this with utf8_is_valid)
+* @param integer (optional) offset (from left)
+* @return mixed integer position or FALSE on failure
+* @package utf8
+* @subpackage strings
+*/
+function utf8_strrpos($str, $search, $offset = FALSE){
+    if ( $offset === FALSE ) {
+        # Emulate behaviour of strrpos rather than raising warning
+        if ( empty($str) ) {
+            return FALSE;
+        }
+        return mb_strrpos($str, $search);
+    } else {
+        if ( !is_int($offset) ) {
+            trigger_error('utf8_strrpos expects parameter 3 to be long',E_USER_WARNING);
+            return FALSE;
+        }
+        
+        $str = mb_substr($str, $offset);
+        
+        if ( FALSE !== ( $pos = mb_strrpos($str, $search) ) ) {
+            return $pos + $offset;
+        }
+        
+        return FALSE;
+    }
+}
+
+//--------------------------------------------------------------------
+/**
+* Assumes mbstring internal encoding is set to UTF-8
+* Wrapper around mb_substr
+* Return part of a string given character offset (and optionally length)
+* @param string
+* @param integer number of UTF-8 characters offset (from left)
+* @param integer (optional) length in UTF-8 characters from offset
+* @return mixed string or FALSE if failure
+* @package utf8
+* @subpackage strings
+*/
+function utf8_substr($str, $offset, $length = FALSE){
+    if ( $length === FALSE ) {
+        return mb_substr($str, $offset);
+    } else {
+        return mb_substr($str, $offset, $length);
+    }
+}
+
+//--------------------------------------------------------------------
+/**
+* Assumes mbstring internal encoding is set to UTF-8
+* Wrapper around mb_strtolower
+* Make a string lowercase
+* Note: The concept of a characters "case" only exists is some alphabets
+* such as Latin, Greek, Cyrillic, Armenian and archaic Georgian - it does
+* not exist in the Chinese alphabet, for example. See Unicode Standard
+* Annex #21: Case Mappings
+* @param string
+* @return mixed either string in lowercase or FALSE is UTF-8 invalid
+* @package utf8
+* @subpackage strings
+*/
+function utf8_strtolower($str){
+    return mb_strtolower($str);
+}
+
+//--------------------------------------------------------------------
+/**
+* Assumes mbstring internal encoding is set to UTF-8
+* Wrapper around mb_strtoupper
+* Make a string uppercase
+* Note: The concept of a characters "case" only exists is some alphabets
+* such as Latin, Greek, Cyrillic, Armenian and archaic Georgian - it does
+* not exist in the Chinese alphabet, for example. See Unicode Standard
+* Annex #21: Case Mappings
+* @param string
+* @return mixed either string in lowercase or FALSE is UTF-8 invalid
+* @package utf8
+* @subpackage strings
+*/
+function utf8_strtoupper($str){
+    return mb_strtoupper($str);
+}

Added: plog/trunk/class/data/utf8/native/core.php
===================================================================
--- plog/trunk/class/data/utf8/native/core.php	                        (rev 0)
+++ plog/trunk/class/data/utf8/native/core.php	2007-07-19 18:22:10 UTC (rev 5685)
@@ -0,0 +1,438 @@
+<?php
+/**
+* @version $Id: core.php,v 1.8 2006/10/17 09:48:06 harryf Exp $
+* @package utf8
+* @subpackage strings
+*/
+
+/**
+* Define UTF8_CORE as required
+*/
+if ( !defined('UTF8_CORE') ) {
+    define('UTF8_CORE',TRUE);
+}
+
+//--------------------------------------------------------------------
+/**
+* Unicode aware replacement for strlen(). Returns the number
+* of characters in the string (not the number of bytes), replacing
+* multibyte characters with a single byte equivalent
+* utf8_decode() converts characters that are not in ISO-8859-1
+* to '?', which, for the purpose of counting, is alright - It's
+* much faster than iconv_strlen
+* Note: this function does not count bad UTF-8 bytes in the string
+* - these are simply ignored
+* @author <chernyshevsky at hotmail dot com>
+* @link   http://www.php.net/manual/en/function.strlen.php
+* @link   http://www.php.net/manual/en/function.utf8-decode.php
+* @param string UTF-8 string
+* @return int number of UTF-8 characters in string
+* @package utf8
+* @subpackage strings
+*/
+function utf8_strlen($str){
+    return strlen(utf8_decode($str));
+}
+
+
+//--------------------------------------------------------------------
+/**
+* UTF-8 aware alternative to strpos
+* Find position of first occurrence of a string
+* Note: This will get alot slower if offset is used
+* Note: requires utf8_strlen amd utf8_substr to be loaded
+* @param string haystack
+* @param string needle (you should validate this with utf8_is_valid)
+* @param integer offset in characters (from left)
+* @return mixed integer position or FALSE on failure
+* @see http://www.php.net/strpos
+* @see utf8_strlen
+* @see utf8_substr
+* @package utf8
+* @subpackage strings
+*/
+function utf8_strpos($str, $needle, $offset = NULL) {
+    
+    if ( is_null($offset) ) {
+    
+        $ar = explode($needle, $str);
+        if ( count($ar) > 1 ) {
+            return utf8_strlen($ar[0]);
+        }
+        return FALSE;
+        
+    } else {
+        
+        if ( !is_int($offset) ) {
+            trigger_error('utf8_strpos: Offset must be an integer',E_USER_ERROR);
+            return FALSE;
+        }
+        
+        $str = utf8_substr($str, $offset);
+        
+        if ( FALSE !== ( $pos = utf8_strpos($str, $needle) ) ) {
+            return $pos + $offset;
+        }
+        
+        return FALSE;
+    }
+    
+}
+
+//--------------------------------------------------------------------
+/**
+* UTF-8 aware alternative to strrpos
+* Find position of last occurrence of a char in a string
+* Note: This will get alot slower if offset is used
+* Note: requires utf8_substr and utf8_strlen to be loaded
+* @param string haystack
+* @param string needle (you should validate this with utf8_is_valid)
+* @param integer (optional) offset (from left)
+* @return mixed integer position or FALSE on failure
+* @see http://www.php.net/strrpos
+* @see utf8_substr
+* @see utf8_strlen
+* @package utf8
+* @subpackage strings
+*/
+function utf8_strrpos($str, $needle, $offset = NULL) {
+    
+    if ( is_null($offset) ) {
+    
+        $ar = explode($needle, $str);
+        
+        if ( count($ar) > 1 ) {
+            // Pop off the end of the string where the last match was made
+            array_pop($ar);
+            $str = join($needle,$ar);
+            return utf8_strlen($str);
+        }
+        return FALSE;
+        
+    } else {
+        
+        if ( !is_int($offset) ) {
+            trigger_error('utf8_strrpos expects parameter 3 to be long',E_USER_WARNING);
+            return FALSE;
+        }
+        
+        $str = utf8_substr($str, $offset);
+        
+        if ( FALSE !== ( $pos = utf8_strrpos($str, $needle) ) ) {
+            return $pos + $offset;
+        }
+        
+        return FALSE;
+    }
+    
+}
+
+//--------------------------------------------------------------------
+/**
+* UTF-8 aware alternative to substr
+* Return part of a string given character offset (and optionally length)
+*
+* Note arguments: comparied to substr - if offset or length are
+* not integers, this version will not complain but rather massages them
+* into an integer.
+*
+* Note on returned values: substr documentation states false can be
+* returned in some cases (e.g. offset > string length)
+* mb_substr never returns false, it will return an empty string instead.
+* This adopts the mb_substr approach
+*
+* Note on implementation: PCRE only supports repetitions of less than
+* 65536, in order to accept up to MAXINT values for offset and length,
+* we'll repeat a group of 65535 characters when needed.
+*
+* Note on implementation: calculating the number of characters in the
+* string is a relatively expensive operation, so we only carry it out when
+* necessary. It isn't necessary for +ve offsets and no specified length
+*
+* @author Chris Smith<chris at jalakai.co.uk>
+* @param string
+* @param integer number of UTF-8 characters offset (from left)
+* @param integer (optional) length in UTF-8 characters from offset
+* @return mixed string or FALSE if failure
+* @package utf8
+* @subpackage strings
+*/
+function utf8_substr($str, $offset, $length = NULL) {
+    
+    // generates E_NOTICE
+    // for PHP4 objects, but not PHP5 objects
+    $str = (string)$str;
+    $offset = (int)$offset;
+    if (!is_null($length)) $length = (int)$length;
+    
+    // handle trivial cases
+    if ($length === 0) return '';
+    if ($offset < 0 && $length < 0 && $length < $offset)
+        return '';
+    
+    // normalise negative offsets (we could use a tail
+    // anchored pattern, but they are horribly slow!)
+    if ($offset < 0) {
+        
+        // see notes
+        $strlen = strlen(utf8_decode($str));
+        $offset = $strlen + $offset;
+        if ($offset < 0) $offset = 0;
+        
+    }
+    
+    $Op = '';
+    $Lp = '';
+    
+    // establish a pattern for offset, a
+    // non-captured group equal in length to offset
+    if ($offset > 0) {
+        
+        $Ox = (int)($offset/65535);
+        $Oy = $offset%65535;
+        
+        if ($Ox) {
+            $Op = '(?:.{65535}){'.$Ox.'}';
+        }
+        
+        $Op = '^(?:'.$Op.'.{'.$Oy.'})';
+        
+    } else {
+        
+        // offset == 0; just anchor the pattern
+        $Op = '^';
+        
+    }
+    
+    // establish a pattern for length
+    if (is_null($length)) {
+        
+        // the rest of the string
+        $Lp = '(.*)$';
+        
+    } else {
+        
+        if (!isset($strlen)) {
+            // see notes
+            $strlen = strlen(utf8_decode($str));
+        }
+        
+        // another trivial case
+        if ($offset > $strlen) return '';
+        
+        if ($length > 0) {
+            
+            // reduce any length that would
+            // go passed the end of the string
+            $length = min($strlen-$offset, $length);
+            
+            $Lx = (int)( $length / 65535 );
+            $Ly = $length % 65535;
+            
+            // negative length requires a captured group
+            // of length characters
+            if ($Lx) $Lp = '(?:.{65535}){'.$Lx.'}';
+            $Lp = '('.$Lp.'.{'.$Ly.'})';
+            
+        } else if ($length < 0) {
+            
+            if ( $length < ($offset - $strlen) ) {
+                return '';
+            }
+            
+            $Lx = (int)((-$length)/65535);
+            $Ly = (-$length)%65535;
+            
+            // negative length requires ... capture everything
+            // except a group of  -length characters
+            // anchored at the tail-end of the string
+            if ($Lx) $Lp = '(?:.{65535}){'.$Lx.'}';
+            $Lp = '(.*)(?:'.$Lp.'.{'.$Ly.'})$';
+            
+        }
+        
+    }
+    
+    if (!preg_match( '#'.$Op.$Lp.'#us',$str, $match )) {
+        return '';
+    }
+    
+    return $match[1];
+    
+}
+
+//---------------------------------------------------------------
+/**
+* UTF-8 aware alternative to strtolower
+* Make a string lowercase
+* Note: The concept of a characters "case" only exists is some alphabets
+* such as Latin, Greek, Cyrillic, Armenian and archaic Georgian - it does
+* not exist in the Chinese alphabet, for example. See Unicode Standard
+* Annex #21: Case Mappings
+* Note: requires utf8_to_unicode and utf8_from_unicode
+* @author Andreas Gohr <andi at splitbrain.org>
+* @param string
+* @return mixed either string in lowercase or FALSE is UTF-8 invalid
+* @see http://www.php.net/strtolower
+* @see utf8_to_unicode
+* @see utf8_from_unicode
+* @see http://www.unicode.org/reports/tr21/tr21-5.html
+* @see http://dev.splitbrain.org/view/darcs/dokuwiki/inc/utf8.php
+* @package utf8
+* @subpackage strings
+*/
+function utf8_strtolower($string){
+    
+    static $UTF8_UPPER_TO_LOWER = NULL;
+    
+    if ( is_null($UTF8_UPPER_TO_LOWER) ) {
+        $UTF8_UPPER_TO_LOWER = array(
+    0x0041=>0x0061, 0x03A6=>0x03C6, 0x0162=>0x0163, 0x00C5=>0x00E5, 0x0042=>0x0062,
+    0x0139=>0x013A, 0x00C1=>0x00E1, 0x0141=>0x0142, 0x038E=>0x03CD, 0x0100=>0x0101,
+    0x0490=>0x0491, 0x0394=>0x03B4, 0x015A=>0x015B, 0x0044=>0x0064, 0x0393=>0x03B3,
+    0x00D4=>0x00F4, 0x042A=>0x044A, 0x0419=>0x0439, 0x0112=>0x0113, 0x041C=>0x043C,
+    0x015E=>0x015F, 0x0143=>0x0144, 0x00CE=>0x00EE, 0x040E=>0x045E, 0x042F=>0x044F,
+    0x039A=>0x03BA, 0x0154=>0x0155, 0x0049=>0x0069, 0x0053=>0x0073, 0x1E1E=>0x1E1F,
+    0x0134=>0x0135, 0x0427=>0x0447, 0x03A0=>0x03C0, 0x0418=>0x0438, 0x00D3=>0x00F3,
+    0x0420=>0x0440, 0x0404=>0x0454, 0x0415=>0x0435, 0x0429=>0x0449, 0x014A=>0x014B,
+    0x0411=>0x0431, 0x0409=>0x0459, 0x1E02=>0x1E03, 0x00D6=>0x00F6, 0x00D9=>0x00F9,
+    0x004E=>0x006E, 0x0401=>0x0451, 0x03A4=>0x03C4, 0x0423=>0x0443, 0x015C=>0x015D,
+    0x0403=>0x0453, 0x03A8=>0x03C8, 0x0158=>0x0159, 0x0047=>0x0067, 0x00C4=>0x00E4,
+    0x0386=>0x03AC, 0x0389=>0x03AE, 0x0166=>0x0167, 0x039E=>0x03BE, 0x0164=>0x0165,
+    0x0116=>0x0117, 0x0108=>0x0109, 0x0056=>0x0076, 0x00DE=>0x00FE, 0x0156=>0x0157,
+    0x00DA=>0x00FA, 0x1E60=>0x1E61, 0x1E82=>0x1E83, 0x00C2=>0x00E2, 0x0118=>0x0119,
+    0x0145=>0x0146, 0x0050=>0x0070, 0x0150=>0x0151, 0x042E=>0x044E, 0x0128=>0x0129,
+    0x03A7=>0x03C7, 0x013D=>0x013E, 0x0422=>0x0442, 0x005A=>0x007A, 0x0428=>0x0448,
+    0x03A1=>0x03C1, 0x1E80=>0x1E81, 0x016C=>0x016D, 0x00D5=>0x00F5, 0x0055=>0x0075,
+    0x0176=>0x0177, 0x00DC=>0x00FC, 0x1E56=>0x1E57, 0x03A3=>0x03C3, 0x041A=>0x043A,
+    0x004D=>0x006D, 0x016A=>0x016B, 0x0170=>0x0171, 0x0424=>0x0444, 0x00CC=>0x00EC,
+    0x0168=>0x0169, 0x039F=>0x03BF, 0x004B=>0x006B, 0x00D2=>0x00F2, 0x00C0=>0x00E0,
+    0x0414=>0x0434, 0x03A9=>0x03C9, 0x1E6A=>0x1E6B, 0x00C3=>0x00E3, 0x042D=>0x044D,
+    0x0416=>0x0436, 0x01A0=>0x01A1, 0x010C=>0x010D, 0x011C=>0x011D, 0x00D0=>0x00F0,
+    0x013B=>0x013C, 0x040F=>0x045F, 0x040A=>0x045A, 0x00C8=>0x00E8, 0x03A5=>0x03C5,
+    0x0046=>0x0066, 0x00DD=>0x00FD, 0x0043=>0x0063, 0x021A=>0x021B, 0x00CA=>0x00EA,
+    0x0399=>0x03B9, 0x0179=>0x017A, 0x00CF=>0x00EF, 0x01AF=>0x01B0, 0x0045=>0x0065,
+    0x039B=>0x03BB, 0x0398=>0x03B8, 0x039C=>0x03BC, 0x040C=>0x045C, 0x041F=>0x043F,
+    0x042C=>0x044C, 0x00DE=>0x00FE, 0x00D0=>0x00F0, 0x1EF2=>0x1EF3, 0x0048=>0x0068,
+    0x00CB=>0x00EB, 0x0110=>0x0111, 0x0413=>0x0433, 0x012E=>0x012F, 0x00C6=>0x00E6,
+    0x0058=>0x0078, 0x0160=>0x0161, 0x016E=>0x016F, 0x0391=>0x03B1, 0x0407=>0x0457,
+    0x0172=>0x0173, 0x0178=>0x00FF, 0x004F=>0x006F, 0x041B=>0x043B, 0x0395=>0x03B5,
+    0x0425=>0x0445, 0x0120=>0x0121, 0x017D=>0x017E, 0x017B=>0x017C, 0x0396=>0x03B6,
+    0x0392=>0x03B2, 0x0388=>0x03AD, 0x1E84=>0x1E85, 0x0174=>0x0175, 0x0051=>0x0071,
+    0x0417=>0x0437, 0x1E0A=>0x1E0B, 0x0147=>0x0148, 0x0104=>0x0105, 0x0408=>0x0458,
+    0x014C=>0x014D, 0x00CD=>0x00ED, 0x0059=>0x0079, 0x010A=>0x010B, 0x038F=>0x03CE,
+    0x0052=>0x0072, 0x0410=>0x0430, 0x0405=>0x0455, 0x0402=>0x0452, 0x0126=>0x0127,
+    0x0136=>0x0137, 0x012A=>0x012B, 0x038A=>0x03AF, 0x042B=>0x044B, 0x004C=>0x006C,
+    0x0397=>0x03B7, 0x0124=>0x0125, 0x0218=>0x0219, 0x00DB=>0x00FB, 0x011E=>0x011F,
+    0x041E=>0x043E, 0x1E40=>0x1E41, 0x039D=>0x03BD, 0x0106=>0x0107, 0x03AB=>0x03CB,
+    0x0426=>0x0446, 0x00DE=>0x00FE, 0x00C7=>0x00E7, 0x03AA=>0x03CA, 0x0421=>0x0441,
+    0x0412=>0x0432, 0x010E=>0x010F, 0x00D8=>0x00F8, 0x0057=>0x0077, 0x011A=>0x011B,
+    0x0054=>0x0074, 0x004A=>0x006A, 0x040B=>0x045B, 0x0406=>0x0456, 0x0102=>0x0103,
+    0x039B=>0x03BB, 0x00D1=>0x00F1, 0x041D=>0x043D, 0x038C=>0x03CC, 0x00C9=>0x00E9,
+    0x00D0=>0x00F0, 0x0407=>0x0457, 0x0122=>0x0123,
+            );
+    }
+    
+    $uni = utf8_to_unicode($string);
+    
+    if ( !$uni ) {
+        return FALSE;
+    }
+    
+    $cnt = count($uni);
+    for ($i=0; $i < $cnt; $i++){
+        if ( isset($UTF8_UPPER_TO_LOWER[$uni[$i]]) ) {
+            $uni[$i] = $UTF8_UPPER_TO_LOWER[$uni[$i]];
+        }
+    }
+    
+    return utf8_from_unicode($uni);
+}
+
+//---------------------------------------------------------------
+/**
+* UTF-8 aware alternative to strtoupper
+* Make a string uppercase
+* Note: The concept of a characters "case" only exists is some alphabets
+* such as Latin, Greek, Cyrillic, Armenian and archaic Georgian - it does
+* not exist in the Chinese alphabet, for example. See Unicode Standard
+* Annex #21: Case Mappings
+* Note: requires utf8_to_unicode and utf8_from_unicode
+* @author Andreas Gohr <andi at splitbrain.org>
+* @param string
+* @return mixed either string in lowercase or FALSE is UTF-8 invalid
+* @see http://www.php.net/strtoupper
+* @see utf8_to_unicode
+* @see utf8_from_unicode
+* @see http://www.unicode.org/reports/tr21/tr21-5.html
+* @see http://dev.splitbrain.org/view/darcs/dokuwiki/inc/utf8.php
+* @package utf8
+* @subpackage strings
+*/
+function utf8_strtoupper($string){
+    
+    static $UTF8_LOWER_TO_UPPER = NULL;
+    
+    if ( is_null($UTF8_LOWER_TO_UPPER) ) {
+        $UTF8_LOWER_TO_UPPER = array(
+    0x0061=>0x0041, 0x03C6=>0x03A6, 0x0163=>0x0162, 0x00E5=>0x00C5, 0x0062=>0x0042,
+    0x013A=>0x0139, 0x00E1=>0x00C1, 0x0142=>0x0141, 0x03CD=>0x038E, 0x0101=>0x0100,
+    0x0491=>0x0490, 0x03B4=>0x0394, 0x015B=>0x015A, 0x0064=>0x0044, 0x03B3=>0x0393,
+    0x00F4=>0x00D4, 0x044A=>0x042A, 0x0439=>0x0419, 0x0113=>0x0112, 0x043C=>0x041C,
+    0x015F=>0x015E, 0x0144=>0x0143, 0x00EE=>0x00CE, 0x045E=>0x040E, 0x044F=>0x042F,
+    0x03BA=>0x039A, 0x0155=>0x0154, 0x0069=>0x0049, 0x0073=>0x0053, 0x1E1F=>0x1E1E,
+    0x0135=>0x0134, 0x0447=>0x0427, 0x03C0=>0x03A0, 0x0438=>0x0418, 0x00F3=>0x00D3,
+    0x0440=>0x0420, 0x0454=>0x0404, 0x0435=>0x0415, 0x0449=>0x0429, 0x014B=>0x014A,
+    0x0431=>0x0411, 0x0459=>0x0409, 0x1E03=>0x1E02, 0x00F6=>0x00D6, 0x00F9=>0x00D9,
+    0x006E=>0x004E, 0x0451=>0x0401, 0x03C4=>0x03A4, 0x0443=>0x0423, 0x015D=>0x015C,
+    0x0453=>0x0403, 0x03C8=>0x03A8, 0x0159=>0x0158, 0x0067=>0x0047, 0x00E4=>0x00C4,
+    0x03AC=>0x0386, 0x03AE=>0x0389, 0x0167=>0x0166, 0x03BE=>0x039E, 0x0165=>0x0164,
+    0x0117=>0x0116, 0x0109=>0x0108, 0x0076=>0x0056, 0x00FE=>0x00DE, 0x0157=>0x0156,
+    0x00FA=>0x00DA, 0x1E61=>0x1E60, 0x1E83=>0x1E82, 0x00E2=>0x00C2, 0x0119=>0x0118,
+    0x0146=>0x0145, 0x0070=>0x0050, 0x0151=>0x0150, 0x044E=>0x042E, 0x0129=>0x0128,
+    0x03C7=>0x03A7, 0x013E=>0x013D, 0x0442=>0x0422, 0x007A=>0x005A, 0x0448=>0x0428,
+    0x03C1=>0x03A1, 0x1E81=>0x1E80, 0x016D=>0x016C, 0x00F5=>0x00D5, 0x0075=>0x0055,
+    0x0177=>0x0176, 0x00FC=>0x00DC, 0x1E57=>0x1E56, 0x03C3=>0x03A3, 0x043A=>0x041A,
+    0x006D=>0x004D, 0x016B=>0x016A, 0x0171=>0x0170, 0x0444=>0x0424, 0x00EC=>0x00CC,
+    0x0169=>0x0168, 0x03BF=>0x039F, 0x006B=>0x004B, 0x00F2=>0x00D2, 0x00E0=>0x00C0,
+    0x0434=>0x0414, 0x03C9=>0x03A9, 0x1E6B=>0x1E6A, 0x00E3=>0x00C3, 0x044D=>0x042D,
+    0x0436=>0x0416, 0x01A1=>0x01A0, 0x010D=>0x010C, 0x011D=>0x011C, 0x00F0=>0x00D0,
+    0x013C=>0x013B, 0x045F=>0x040F, 0x045A=>0x040A, 0x00E8=>0x00C8, 0x03C5=>0x03A5,
+    0x0066=>0x0046, 0x00FD=>0x00DD, 0x0063=>0x0043, 0x021B=>0x021A, 0x00EA=>0x00CA,
+    0x03B9=>0x0399, 0x017A=>0x0179, 0x00EF=>0x00CF, 0x01B0=>0x01AF, 0x0065=>0x0045,
+    0x03BB=>0x039B, 0x03B8=>0x0398, 0x03BC=>0x039C, 0x045C=>0x040C, 0x043F=>0x041F,
+    0x044C=>0x042C, 0x00FE=>0x00DE, 0x00F0=>0x00D0, 0x1EF3=>0x1EF2, 0x0068=>0x0048,
+    0x00EB=>0x00CB, 0x0111=>0x0110, 0x0433=>0x0413, 0x012F=>0x012E, 0x00E6=>0x00C6,
+    0x0078=>0x0058, 0x0161=>0x0160, 0x016F=>0x016E, 0x03B1=>0x0391, 0x0457=>0x0407,
+    0x0173=>0x0172, 0x00FF=>0x0178, 0x006F=>0x004F, 0x043B=>0x041B, 0x03B5=>0x0395,
+    0x0445=>0x0425, 0x0121=>0x0120, 0x017E=>0x017D, 0x017C=>0x017B, 0x03B6=>0x0396,
+    0x03B2=>0x0392, 0x03AD=>0x0388, 0x1E85=>0x1E84, 0x0175=>0x0174, 0x0071=>0x0051,
+    0x0437=>0x0417, 0x1E0B=>0x1E0A, 0x0148=>0x0147, 0x0105=>0x0104, 0x0458=>0x0408,
+    0x014D=>0x014C, 0x00ED=>0x00CD, 0x0079=>0x0059, 0x010B=>0x010A, 0x03CE=>0x038F,
+    0x0072=>0x0052, 0x0430=>0x0410, 0x0455=>0x0405, 0x0452=>0x0402, 0x0127=>0x0126,
+    0x0137=>0x0136, 0x012B=>0x012A, 0x03AF=>0x038A, 0x044B=>0x042B, 0x006C=>0x004C,
+    0x03B7=>0x0397, 0x0125=>0x0124, 0x0219=>0x0218, 0x00FB=>0x00DB, 0x011F=>0x011E,
+    0x043E=>0x041E, 0x1E41=>0x1E40, 0x03BD=>0x039D, 0x0107=>0x0106, 0x03CB=>0x03AB,
+    0x0446=>0x0426, 0x00FE=>0x00DE, 0x00E7=>0x00C7, 0x03CA=>0x03AA, 0x0441=>0x0421,
+    0x0432=>0x0412, 0x010F=>0x010E, 0x00F8=>0x00D8, 0x0077=>0x0057, 0x011B=>0x011A,
+    0x0074=>0x0054, 0x006A=>0x004A, 0x045B=>0x040B, 0x0456=>0x0406, 0x0103=>0x0102,
+    0x03BB=>0x039B, 0x00F1=>0x00D1, 0x043D=>0x041D, 0x03CC=>0x038C, 0x00E9=>0x00C9,
+    0x00F0=>0x00D0, 0x0457=>0x0407, 0x0123=>0x0122,
+            );
+    }
+    
+    $uni = utf8_to_unicode($string);
+    
+    if ( !$uni ) {
+        return FALSE;
+    }
+    
+    $cnt = count($uni);
+    for ($i=0; $i < $cnt; $i++){
+        if( isset($UTF8_LOWER_TO_UPPER[$uni[$i]]) ) {
+            $uni[$i] = $UTF8_LOWER_TO_UPPER[$uni[$i]];
+        }
+    }
+    
+    return utf8_from_unicode($uni);
+}

Added: plog/trunk/class/data/utf8/ord.php
===================================================================
--- plog/trunk/class/data/utf8/ord.php	                        (rev 0)
+++ plog/trunk/class/data/utf8/ord.php	2007-07-19 18:22:10 UTC (rev 5685)
@@ -0,0 +1,92 @@
+<?php
+/**
+* @version $Id: ord.php,v 1.4 2006/09/11 15:22:54 harryf Exp $
+* @package utf8
+* @subpackage strings
+*/
+
+//---------------------------------------------------------------
+/**
+* UTF-8 aware alternative to ord
+* Returns the unicode ordinal for a character
+* @param string UTF-8 encoded character
+* @return int unicode ordinal for the character
+* @see http://www.php.net/ord
+* @see http://www.php.net/manual/en/function.ord.php#46267
+*/
+function utf8_ord($chr) {
+    
+    $ord0 = ord($chr);
+    
+    if ( $ord0 >= 0 && $ord0 <= 127 ) {
+        return $ord0;
+    }
+    
+    if ( !isset($chr{1}) ) {
+        trigger_error('Short sequence - at least 2 bytes expected, only 1 seen');
+        return FALSE;
+    }
+    
+    $ord1 = ord($chr{1});
+    if ( $ord0 >= 192 && $ord0 <= 223 ) {
+        return ( $ord0 - 192 ) * 64 
+            + ( $ord1 - 128 );
+    }
+    
+    if ( !isset($chr{2}) ) {
+        trigger_error('Short sequence - at least 3 bytes expected, only 2 seen');
+        return FALSE;
+    }
+    $ord2 = ord($chr{2});
+    if ( $ord0 >= 224 && $ord0 <= 239 ) {
+        return ($ord0-224)*4096 
+            + ($ord1-128)*64 
+                + ($ord2-128);
+    }
+    
+    if ( !isset($chr{3}) ) {
+        trigger_error('Short sequence - at least 4 bytes expected, only 3 seen');
+        return FALSE;
+    }
+    $ord3 = ord($chr{3});
+    if ($ord0>=240 && $ord0<=247) {
+        return ($ord0-240)*262144 
+            + ($ord1-128)*4096 
+                + ($ord2-128)*64 
+                    + ($ord3-128);
+    
+    }
+    
+    if ( !isset($chr{4}) ) {
+        trigger_error('Short sequence - at least 5 bytes expected, only 4 seen');
+        return FALSE;
+    }
+    $ord4 = ord($chr{4});
+    if ($ord0>=248 && $ord0<=251) {
+        return ($ord0-248)*16777216 
+            + ($ord1-128)*262144 
+                + ($ord2-128)*4096 
+                    + ($ord3-128)*64 
+                        + ($ord4-128);
+    }
+    
+    if ( !isset($chr{5}) ) {
+        trigger_error('Short sequence - at least 6 bytes expected, only 5 seen');
+        return FALSE;
+    }
+    if ($ord0>=252 && $ord0<=253) {
+        return ($ord0-252) * 1073741824 
+            + ($ord1-128)*16777216 
+                + ($ord2-128)*262144 
+                    + ($ord3-128)*4096 
+                        + ($ord4-128)*64 
+                            + (ord($c{5})-128);
+    }
+    
+    if ( $ord0 >= 254 && $ord0 <= 255 ) { 
+        trigger_error('Invalid UTF-8 with surrogate ordinal '.$ord0);
+        return FALSE;
+    }
+    
+}
+

Added: plog/trunk/class/data/utf8/str_ireplace.php
===================================================================
--- plog/trunk/class/data/utf8/str_ireplace.php	                        (rev 0)
+++ plog/trunk/class/data/utf8/str_ireplace.php	2007-07-19 18:22:10 UTC (rev 5685)
@@ -0,0 +1,79 @@
+<?php
+/**
+* @version $Id: str_ireplace.php,v 1.1 2006/02/25 13:50:17 harryf Exp $
+* @package utf8
+* @subpackage strings
+*/
+
+//---------------------------------------------------------------
+/**
+* UTF-8 aware alternative to str_ireplace
+* Case-insensitive version of str_replace
+* Note: requires utf8_strtolower
+* Note: it's not fast and gets slower if $search / $replace is array
+* Notes: it's based on the assumption that the lower and uppercase
+* versions of a UTF-8 character will have the same length in bytes
+* which is currently true given the hash table to strtolower
+* @param string
+* @return string
+* @see http://www.php.net/str_ireplace
+* @see utf8_strtolower
+* @package utf8
+* @subpackage strings
+*/
+function utf8_ireplace($search, $replace, $str, $count = NULL){
+    
+    if ( !is_array($search) ) {
+        
+        $slen = strlen($search);
+        if ( $slen == 0 ) {
+            return $str;
+        }
+        
+        $search = utf8_strtolower($search);
+        
+        $search = preg_quote($search);
+        $lstr = utf8_strtolower($str);
+        $i = 0;
+        $matched = 0;
+        while ( preg_match('/(.*)'.$search.'/Us',$lstr, $matches) ) {
+            if ( $i === $count ) {
+                break;
+            }
+            $mlen = strlen($matches[0]);
+            $lstr = substr($lstr, $mlen);
+            $str = substr_replace($str, $replace, $matched+strlen($matches[1]), $slen);
+                    $matched += $mlen;
+            $i++;
+        }
+        return $str;
+        
+    } else {
+        
+        foreach ( array_keys($search) as $k ) {
+            
+            if ( is_array($replace) ) {
+                
+                if ( array_key_exists($k,$replace) ) {
+                    
+                    $str = utf8_ireplace($search[$k], $replace[$k], $str, $count);
+                    
+                } else {
+                
+                    $str = utf8_ireplace($search[$k], '', $str, $count);
+                    
+                }
+                
+            } else {
+            
+                $str = utf8_ireplace($search[$k], $replace, $str, $count);
+                
+            }
+        }
+        return $str;
+        
+    }
+
+}
+
+

Added: plog/trunk/class/data/utf8/str_pad.php
===================================================================
--- plog/trunk/class/data/utf8/str_pad.php	                        (rev 0)
+++ plog/trunk/class/data/utf8/str_pad.php	2007-07-19 18:22:10 UTC (rev 5685)
@@ -0,0 +1,57 @@
+<?php
+/**
+* @version $Id: str_pad.php,v 1.1 2006/09/03 09:25:13 harryf Exp $
+* @package utf8
+* @subpackage strings
+*/
+
+//---------------------------------------------------------------
+/**
+* Replacement for str_pad. $padStr may contain multi-byte characters.
+*
+* @author Oliver Saunders <oliver (a) osinternetservices.com>
+* @param string $input
+* @param int $length
+* @param string $padStr
+* @param int $type ( same constants as str_pad )
+* @return string
+* @see http://www.php.net/str_pad
+* @see utf8_substr
+* @package utf8
+* @subpackage strings
+*/
+function utf8_str_pad($input, $length, $padStr = ' ', $type = STR_PAD_RIGHT) {
+    
+    $inputLen = utf8_strlen($input);
+    if ($length <= $inputLen) {
+        return $input;
+    }
+    
+    $padStrLen = utf8_strlen($padStr);
+    $padLen = $length - $inputLen;
+    
+    if ($type == STR_PAD_RIGHT) {
+        $repeatTimes = ceil($padLen / $padStrLen);
+        return utf8_substr($input . str_repeat($padStr, $repeatTimes), 0, $length);
+    }
+    
+    if ($type == STR_PAD_LEFT) {
+        $repeatTimes = ceil($padLen / $padStrLen);
+        return utf8_substr(str_repeat($padStr, $repeatTimes), 0, floor($padLen)) . $input;
+    }
+    
+    if ($type == STR_PAD_BOTH) {
+        
+        $padLen/= 2;
+        $padAmountLeft = floor($padLen);
+        $padAmountRight = ceil($padLen);
+        $repeatTimesLeft = ceil($padAmountLeft / $padStrLen);
+        $repeatTimesRight = ceil($padAmountRight / $padStrLen);
+        
+        $paddingLeft = utf8_substr(str_repeat($padStr, $repeatTimesLeft), 0, $padAmountLeft);
+        $paddingRight = utf8_substr(str_repeat($padStr, $repeatTimesRight), 0, $padAmountLeft);
+        return $paddingLeft . $input . $paddingRight;
+    }
+    
+    trigger_error('utf8_str_pad: Unknown padding type (' . $type . ')',E_USER_ERROR);
+}

Added: plog/trunk/class/data/utf8/str_split.php
===================================================================
--- plog/trunk/class/data/utf8/str_split.php	                        (rev 0)
+++ plog/trunk/class/data/utf8/str_split.php	2007-07-19 18:22:10 UTC (rev 5685)
@@ -0,0 +1,35 @@
+<?php
+/**
+* @version $Id: str_split.php,v 1.1 2006/02/25 13:50:17 harryf Exp $
+* @package utf8
+* @subpackage strings
+*/
+
+//---------------------------------------------------------------
+/**
+* UTF-8 aware alternative to str_split
+* Convert a string to an array
+* Note: requires utf8_strlen to be loaded
+* @param string UTF-8 encoded
+* @param int number to characters to split string by
+* @return string characters in string reverses
+* @see http://www.php.net/str_split
+* @see utf8_strlen
+* @package utf8
+* @subpackage strings
+*/
+function utf8_str_split($str, $split_len = 1) {
+    
+    if ( !preg_match('/^[0-9]+$/',$split_len) || $split_len < 1 ) {
+        return FALSE;
+    }
+    
+    $len = utf8_strlen($str);
+    if ( $len <= $split_len ) {
+        return array($str);
+    }
+    
+    preg_match_all('/.{'.$split_len.'}|[^\x00]{1,'.$split_len.'}$/us', $str, $ar);
+    return $ar[0];
+    
+}

Added: plog/trunk/class/data/utf8/strcasecmp.php
===================================================================
--- plog/trunk/class/data/utf8/strcasecmp.php	                        (rev 0)
+++ plog/trunk/class/data/utf8/strcasecmp.php	2007-07-19 18:22:10 UTC (rev 5685)
@@ -0,0 +1,26 @@
+<?php
+/**
+* @version $Id: strcasecmp.php,v 1.1 2006/02/25 13:50:17 harryf Exp $
+* @package utf8
+* @subpackage strings
+*/
+
+//---------------------------------------------------------------
+/**
+* UTF-8 aware alternative to strcasecmp
+* A case insensivite string comparison
+* Note: requires utf8_strtolower
+* @param string
+* @param string
+* @return int
+* @see http://www.php.net/strcasecmp
+* @see utf8_strtolower
+* @package utf8
+* @subpackage strings
+*/
+function utf8_strcasecmp($strX, $strY) {
+    $strX = utf8_strtolower($strX);
+    $strY = utf8_strtolower($strY);
+    return strcmp($strX, $strY);
+}
+

Added: plog/trunk/class/data/utf8/strcspn.php
===================================================================
--- plog/trunk/class/data/utf8/strcspn.php	                        (rev 0)
+++ plog/trunk/class/data/utf8/strcspn.php	2007-07-19 18:22:10 UTC (rev 5685)
@@ -0,0 +1,41 @@
+<?php
+/**
+* @version $Id: strcspn.php,v 1.1 2006/02/25 13:50:17 harryf Exp $
+* @package utf8
+* @subpackage strings
+*/
+
+//---------------------------------------------------------------
+/**
+* UTF-8 aware alternative to strcspn
+* Find length of initial segment not matching mask
+* Note: requires utf8_strlen and utf8_substr (if start, length are used)
+* @param string
+* @return int
+* @see http://www.php.net/strcspn
+* @see utf8_strlen
+* @package utf8
+* @subpackage strings
+*/
+function utf8_strcspn($str, $mask, $start = NULL, $length = NULL) {
+    
+    if ( empty($mask) || strlen($mask) == 0 ) {
+        return NULL;
+    }
+    
+    $mask = preg_replace('!([\\\\\\-\\]\\[/^])!','\\\${1}',$mask);
+    
+    if ( $start !== NULL || $length !== NULL ) {
+        $str = utf8_substr($str, $start, $length);
+    }
+        
+    preg_match('/^[^'.$mask.']+/u',$str, $matches);
+    
+    if ( isset($matches[0]) ) {
+        return utf8_strlen($matches[0]);
+    }
+    
+    return 0;
+    
+}
+

Added: plog/trunk/class/data/utf8/stristr.php
===================================================================
--- plog/trunk/class/data/utf8/stristr.php	                        (rev 0)
+++ plog/trunk/class/data/utf8/stristr.php	2007-07-19 18:22:10 UTC (rev 5685)
@@ -0,0 +1,36 @@
+<?php
+/**
+* @version $Id: stristr.php,v 1.1 2006/02/25 13:50:17 harryf Exp $
+* @package utf8
+* @subpackage strings
+*/
+
+//---------------------------------------------------------------
+/**
+* UTF-8 aware alternative to stristr
+* Find first occurrence of a string using case insensitive comparison
+* Note: requires utf8_strtolower
+* @param string
+* @param string
+* @return int
+* @see http://www.php.net/strcasecmp
+* @see utf8_strtolower
+* @package utf8
+* @subpackage strings
+*/
+function utf8_stristr($str, $search) {
+    
+    if ( strlen($search) == 0 ) {
+        return $str;
+    }
+    
+    $lstr = utf8_strtolower($str);
+    $lsearch = utf8_strtolower($search);
+    preg_match('/^(.*)'.preg_quote($lsearch).'/Us',$lstr, $matches);
+    
+    if ( count($matches) == 2 ) {
+        return substr($str, strlen($matches[1]));
+    }
+    
+    return FALSE;
+}

Added: plog/trunk/class/data/utf8/strrev.php
===================================================================
--- plog/trunk/class/data/utf8/strrev.php	                        (rev 0)
+++ plog/trunk/class/data/utf8/strrev.php	2007-07-19 18:22:10 UTC (rev 5685)
@@ -0,0 +1,22 @@
+<?php
+/**
+* @version $Id: strrev.php,v 1.1 2006/02/25 13:50:17 harryf Exp $
+* @package utf8
+* @subpackage strings
+*/
+
+//---------------------------------------------------------------
+/**
+* UTF-8 aware alternative to strrev
+* Reverse a string
+* @param string UTF-8 encoded
+* @return string characters in string reverses
+* @see http://www.php.net/strrev
+* @package utf8
+* @subpackage strings
+*/
+function utf8_strrev($str){
+    preg_match_all('/./us', $str, $ar);
+    return join('',array_reverse($ar[0]));
+}
+

Added: plog/trunk/class/data/utf8/strspn.php
===================================================================
--- plog/trunk/class/data/utf8/strspn.php	                        (rev 0)
+++ plog/trunk/class/data/utf8/strspn.php	2007-07-19 18:22:10 UTC (rev 5685)
@@ -0,0 +1,36 @@
+<?php
+/**
+* @version $Id: strspn.php,v 1.1 2006/02/25 13:50:17 harryf Exp $
+* @package utf8
+* @subpackage strings
+*/
+
+//---------------------------------------------------------------
+/**
+* UTF-8 aware alternative to strspn
+* Find length of initial segment matching mask
+* Note: requires utf8_strlen and utf8_substr (if start, length are used)
+* @param string
+* @return int
+* @see http://www.php.net/strspn
+* @package utf8
+* @subpackage strings
+*/
+function utf8_strspn($str, $mask, $start = NULL, $length = NULL) {
+    
+    $mask = preg_replace('!([\\\\\\-\\]\\[/^])!','\\\${1}',$mask);
+    
+    if ( $start !== NULL || $length !== NULL ) {
+        $str = utf8_substr($str, $start, $length);
+    }
+        
+    preg_match('/^['.$mask.']+/u',$str, $matches);
+    
+    if ( isset($matches[0]) ) {
+        return utf8_strlen($matches[0]);
+    }
+    
+    return 0;
+
+}
+

Added: plog/trunk/class/data/utf8/substr_replace.php
===================================================================
--- plog/trunk/class/data/utf8/substr_replace.php	                        (rev 0)
+++ plog/trunk/class/data/utf8/substr_replace.php	2007-07-19 18:22:10 UTC (rev 5685)
@@ -0,0 +1,24 @@
+<?php
+/**
+* @version $Id: substr_replace.php,v 1.1 2006/02/25 13:50:17 harryf Exp $
+* @package utf8
+* @subpackage strings
+*/
+
+//---------------------------------------------------------------
+/**
+* UTF-8 aware substr_replace.
+* Note: requires utf8_substr to be loaded
+* @see http://www.php.net/substr_replace
+* @see utf8_strlen
+* @see utf8_substr
+*/
+function utf8_substr_replace($str, $repl, $start , $length = NULL ) {
+    preg_match_all('/./us', $str, $ar);
+    preg_match_all('/./us', $repl, $rar);
+    if( $length === NULL ) {
+        $length = utf8_strlen($str);
+    }
+    array_splice( $ar[0], $start, $length, $rar[0] );
+    return join('',$ar[0]);
+}

Added: plog/trunk/class/data/utf8/trim.php
===================================================================
--- plog/trunk/class/data/utf8/trim.php	                        (rev 0)
+++ plog/trunk/class/data/utf8/trim.php	2007-07-19 18:22:10 UTC (rev 5685)
@@ -0,0 +1,68 @@
+<?php
+/**
+* @version $Id: trim.php,v 1.1 2006/02/25 13:50:17 harryf Exp $
+* @package utf8
+* @subpackage strings
+*/
+
+//---------------------------------------------------------------
+/**
+* UTF-8 aware replacement for ltrim()
+* Note: you only need to use this if you are supplying the charlist
+* optional arg and it contains UTF-8 characters. Otherwise ltrim will
+* work normally on a UTF-8 string
+* @author Andreas Gohr <andi at splitbrain.org>
+* @see http://www.php.net/ltrim
+* @see http://dev.splitbrain.org/view/darcs/dokuwiki/inc/utf8.php
+* @return string
+* @package utf8
+* @subpackage strings
+*/
+function utf8_ltrim( $str, $charlist = FALSE ) {
+    if($charlist === FALSE) return ltrim($str);
+    
+    //quote charlist for use in a characterclass
+    $charlist = preg_replace('!([\\\\\\-\\]\\[/^])!','\\\${1}',$charlist);
+    
+    return preg_replace('/^['.$charlist.']+/u','',$str);
+}
+
+//---------------------------------------------------------------
+/**
+* UTF-8 aware replacement for rtrim()
+* Note: you only need to use this if you are supplying the charlist
+* optional arg and it contains UTF-8 characters. Otherwise rtrim will
+* work normally on a UTF-8 string
+* @author Andreas Gohr <andi at splitbrain.org>
+* @see http://www.php.net/rtrim
+* @see http://dev.splitbrain.org/view/darcs/dokuwiki/inc/utf8.php
+* @return string
+* @package utf8
+* @subpackage strings
+*/
+function utf8_rtrim( $str, $charlist = FALSE ) {
+    if($charlist === FALSE) return rtrim($str);
+    
+    //quote charlist for use in a characterclass
+    $charlist = preg_replace('!([\\\\\\-\\]\\[/^])!','\\\${1}',$charlist);
+  
+    return preg_replace('/['.$charlist.']+$/u','',$str);
+}
+
+//---------------------------------------------------------------
+/**
+* UTF-8 aware replacement for trim()
+* Note: you only need to use this if you are supplying the charlist
+* optional arg and it contains UTF-8 characters. Otherwise trim will
+* work normally on a UTF-8 string
+* @author Andreas Gohr <andi at splitbrain.org>
+* @see http://www.php.net/trim
+* @see http://dev.splitbrain.org/view/darcs/dokuwiki/inc/utf8.php
+* @return string
+* @package utf8
+* @subpackage strings
+*/
+function utf8_trim( $str, $charlist = FALSE ) {
+    if($charlist === FALSE) return trim($str);
+    return utf8_ltrim(utf8_rtrim($str, $charlist), $charlist);
+}
\ No newline at end of file

Added: plog/trunk/class/data/utf8/ucfirst.php
===================================================================
--- plog/trunk/class/data/utf8/ucfirst.php	                        (rev 0)
+++ plog/trunk/class/data/utf8/ucfirst.php	2007-07-19 18:22:10 UTC (rev 5685)
@@ -0,0 +1,34 @@
+<?php
+/**
+* @version $Id: ucfirst.php,v 1.1 2006/02/25 13:50:17 harryf Exp $
+* @package utf8
+* @subpackage strings
+*/
+
+//---------------------------------------------------------------
+/**
+* UTF-8 aware alternative to ucfirst
+* Make a string's first character uppercase
+* Note: requires utf8_strtoupper
+* @param string
+* @return string with first character as upper case (if applicable)
+* @see http://www.php.net/ucfirst
+* @see utf8_strtoupper
+* @package utf8
+* @subpackage strings
+*/
+function utf8_ucfirst($str){
+    switch ( utf8_strlen($str) ) {
+        case 0:
+            return '';
+        break;
+        case 1:
+            return utf8_strtoupper($str);
+        break;
+        default:
+            preg_match('/^(.{1})(.*)$/us', $str, $matches);
+            return utf8_strtoupper($matches[1]).$matches[2];
+        break;
+    }
+}
+

Added: plog/trunk/class/data/utf8/ucwords.php
===================================================================
--- plog/trunk/class/data/utf8/ucwords.php	                        (rev 0)
+++ plog/trunk/class/data/utf8/ucwords.php	2007-07-19 18:22:10 UTC (rev 5685)
@@ -0,0 +1,44 @@
+<?php
+/**
+* @version $Id: ucwords.php,v 1.1 2006/02/25 13:50:17 harryf Exp $
+* @package utf8
+* @subpackage strings
+*/
+
+//---------------------------------------------------------------
+/**
+* UTF-8 aware alternative to ucwords
+* Uppercase the first character of each word in a string
+* Note: requires utf8_substr_replace and utf8_strtoupper
+* @param string
+* @return string with first char of each word uppercase
+* @see http://www.php.net/ucwords
+* @package utf8
+* @subpackage strings
+*/
+function utf8_ucwords($str) {
+    // Note: [\x0c\x09\x0b\x0a\x0d\x20] matches;
+    // form feeds, horizontal tabs, vertical tabs, linefeeds and carriage returns
+    // This corresponds to the definition of a "word" defined at http://www.php.net/ucwords
+    $pattern = '/(^|([\x0c\x09\x0b\x0a\x0d\x20]+))([^\x0c\x09\x0b\x0a\x0d\x20]{1})[^\x0c\x09\x0b\x0a\x0d\x20]*/u';
+    return preg_replace_callback($pattern, 'utf8_ucwords_callback',$str);
+}
+
+//---------------------------------------------------------------
+/**
+* Callback function for preg_replace_callback call in utf8_ucwords
+* You don't need to call this yourself
+* @param array of matches corresponding to a single word
+* @return string with first char of the word in uppercase
+* @see utf8_ucwords
+* @see utf8_strtoupper
+* @package utf8
+* @subpackage strings
+*/
+function utf8_ucwords_callback($matches) {
+    $leadingws = $matches[2];
+    $ucfirst = utf8_strtoupper($matches[3]);
+    $ucword = utf8_substr_replace(ltrim($matches[0]),$ucfirst,0,1);
+    return $leadingws . $ucword;
+}
+

Added: plog/trunk/class/data/utf8/utf8.php
===================================================================
--- plog/trunk/class/data/utf8/utf8.php	                        (rev 0)
+++ plog/trunk/class/data/utf8/utf8.php	2007-07-19 18:22:10 UTC (rev 5685)
@@ -0,0 +1,74 @@
+<?php
+/**
+* This is the dynamic loader for the library. It checks whether you have
+* the mbstring extension available and includes relevant files
+* on that basis, falling back to the native (as in written in PHP) version
+* if mbstring is unavailabe.
+*
+* It's probably easiest to use this, if you don't want to understand
+* the dependencies involved, in conjunction with PHP versions etc. At
+* the same time, you might get better performance by managing loading
+* yourself. The smartest way to do this, bearing in mind performance,
+* is probably to "load on demand" - i.e. just before you use these
+* functions in your code, load the version you need.
+*
+* It makes sure the the following functions are available;
+* utf8_strlen, utf8_strpos, utf8_strrpos, utf8_substr,
+* utf8_strtolower, utf8_strtoupper
+* Other functions in the ./native directory depend on these
+* six functions being available
+* @package utf8
+*/
+
+/**
+* Put the current directory in this constant
+*/
+if ( !defined('UTF8') ) {
+    define('UTF8',dirname(__FILE__));
+}
+
+/**
+* If string overloading is active, it will break many of the
+* native implementations. mbstring.func_overload must be set
+* to 0, 1 or 4 in php.ini (string overloading disabled).
+* Also need to check we have the correct internal mbstring
+* encoding
+*/
+if ( extension_loaded('mbstring')) {
+    if ( ini_get('mbstring.func_overload') & MB_OVERLOAD_STRING ) {
+        trigger_error('String functions are overloaded by mbstring',E_USER_ERROR);
+    }
+    mb_internal_encoding('UTF-8');
+}
+
+/**
+* Check whether PCRE has been compiled with UTF-8 support
+*/
+$UTF8_ar = array();
+if ( preg_match('/^.{1}$/u',"ñ",$UTF8_ar) != 1 ) {
+    trigger_error('PCRE is not compiled with UTF-8 support',E_USER_ERROR);
+}
+unset($UTF8_ar);
+
+
+/**
+* Load the smartest implementations of utf8_strpos, utf8_strrpos
+* and utf8_substr
+*/
+if ( !defined('UTF8_CORE') ) {
+    if ( function_exists('mb_substr') ) {
+        require_once UTF8 . '/mbstring/core.php';
+    } else {
+        require_once UTF8 . '/utils/unicode.php';
+        require_once UTF8 . '/native/core.php';
+    }
+}
+
+/**
+* Load the native implementation of utf8_substr_replace
+*/
+require_once UTF8 . '/substr_replace.php';
+
+/**
+* You should now be able to use all the other utf_* string functions
+*/

Added: plog/trunk/class/data/utf8/utils/ascii.php
===================================================================
--- plog/trunk/class/data/utf8/utils/ascii.php	                        (rev 0)
+++ plog/trunk/class/data/utf8/utils/ascii.php	2007-07-19 18:22:10 UTC (rev 5685)
@@ -0,0 +1,220 @@
+<?php
+/**
+* Tools to help with ASCII in UTF-8
+* @version $Id: ascii.php,v 1.5 2006/10/16 20:38:12 harryf Exp $
+* @package utf8
+* @subpackage ascii
+*/
+
+//--------------------------------------------------------------------
+/**
+* Tests whether a string contains only 7bit ASCII bytes.
+* You might use this to conditionally check whether a string
+* needs handling as UTF-8 or not, potentially offering performance
+* benefits by using the native PHP equivalent if it's just ASCII e.g.;
+*
+* <code>
+* if ( utf8_is_ascii($someString) ) {
+*     // It's just ASCII - use the native PHP version
+*     $someString = strtolower($someString);
+* } else {
+*     $someString = utf8_strtolower($someString);
+* }
+* </code>
+* 
+* @param string
+* @return boolean TRUE if it's all ASCII
+* @package utf8
+* @subpackage ascii
+* @see utf8_is_ascii_ctrl
+*/
+function utf8_is_ascii($str) {
+    // Search for any bytes which are outside the ASCII range...
+    return (preg_match('/(?:[^\x00-\x7F])/',$str) !== 1);
+}
+
+//--------------------------------------------------------------------
+/**
+* Tests whether a string contains only 7bit ASCII bytes with device
+* control codes omitted. The device control codes can be found on the
+* second table here: http://www.w3schools.com/tags/ref_ascii.asp
+* 
+* @param string
+* @return boolean TRUE if it's all ASCII without device control codes
+* @package utf8
+* @subpackage ascii
+* @see utf8_is_ascii
+*/
+function utf8_is_ascii_ctrl($str) {
+    if ( strlen($str) > 0 ) {
+        // Search for any bytes which are outside the ASCII range,
+        // or are device control codes
+        return (preg_match('/[^\x09\x0A\x0D\x20-\x7E]/',$str) !== 1);
+    }
+    return FALSE;
+}
+
+//--------------------------------------------------------------------
+/**
+* Strip out all non-7bit ASCII bytes
+* If you need to transmit a string to system which you know can only
+* support 7bit ASCII, you could use this function.
+* @param string
+* @return string with non ASCII bytes removed
+* @package utf8
+* @subpackage ascii
+* @see utf8_strip_non_ascii_ctrl
+*/
+function utf8_strip_non_ascii($str) {
+    ob_start();
+    while ( preg_match(
+        '/^([\x00-\x7F]+)|([^\x00-\x7F]+)/S',
+            $str, $matches) ) {
+        if ( !isset($matches[2]) ) {
+            echo $matches[0];
+        }
+        $str = substr($str, strlen($matches[0]));
+    }
+    $result = ob_get_contents();
+    ob_end_clean();
+    return $result;
+}
+
+//--------------------------------------------------------------------
+/**
+* Strip out device control codes in the ASCII range
+* which are not permitted in XML. Note that this leaves
+* multi-byte characters untouched - it only removes device
+* control codes
+* @see http://hsivonen.iki.fi/producing-xml/#controlchar
+* @param string
+* @return string control codes removed
+*/
+function utf8_strip_ascii_ctrl($str) {
+    ob_start();
+    while ( preg_match(
+        '/^([^\x00-\x08\x0B\x0C\x0E-\x1F\x7F]+)|([\x00-\x08\x0B\x0C\x0E-\x1F\x7F]+)/S',
+            $str, $matches) ) {
+        if ( !isset($matches[2]) ) {
+            echo $matches[0];
+        }
+        $str = substr($str, strlen($matches[0]));
+    }
+    $result = ob_get_contents();
+    ob_end_clean();
+    return $result;
+}
+
+//--------------------------------------------------------------------
+/**
+* Strip out all non 7bit ASCII bytes and ASCII device control codes.
+* For a list of ASCII device control codes see the 2nd table here:
+* http://www.w3schools.com/tags/ref_ascii.asp
+* 
+* @param string
+* @return boolean TRUE if it's all ASCII
+* @package utf8
+* @subpackage ascii
+*/
+function utf8_strip_non_ascii_ctrl($str) {
+    ob_start();
+    while ( preg_match(
+        '/^([\x09\x0A\x0D\x20-\x7E]+)|([^\x09\x0A\x0D\x20-\x7E]+)/S',
+            $str, $matches) ) {
+        if ( !isset($matches[2]) ) {
+            echo $matches[0];
+        }
+        $str = substr($str, strlen($matches[0]));
+    }
+    $result = ob_get_contents();
+    ob_end_clean();
+    return $result;
+}
+
+//---------------------------------------------------------------
+/**
+* Replace accented UTF-8 characters by unaccented ASCII-7 "equivalents".
+* The purpose of this function is to replace characters commonly found in Latin
+* alphabets with something more or less equivalent from the ASCII range. This can
+* be useful for converting a UTF-8 to something ready for a filename, for example.
+* Following the use of this function, you would probably also pass the string
+* through utf8_strip_non_ascii to clean out any other non-ASCII chars
+* Use the optional parameter to just deaccent lower ($case = -1) or upper ($case = 1)
+* letters. Default is to deaccent both cases ($case = 0)
+*
+* For a more complete implementation of transliteration, see the utf8_to_ascii package
+* available from the phputf8 project downloads:
+* http://prdownloads.sourceforge.net/phputf8
+*
+* @param string UTF-8 string
+* @param int (optional) -1 lowercase only, +1 uppercase only, 1 both cases
+* @param string UTF-8 with accented characters replaced by ASCII chars
+* @return string accented chars replaced with ascii equivalents
+* @author Andreas Gohr <andi at splitbrain.org>
+* @package utf8
+* @subpackage ascii
+*/
+function utf8_accents_to_ascii( $str, $case=0 ){
+    
+    static $UTF8_LOWER_ACCENTS = NULL;
+    static $UTF8_UPPER_ACCENTS = NULL;
+    
+    if($case <= 0){
+        
+        if ( is_null($UTF8_LOWER_ACCENTS) ) {
+            $UTF8_LOWER_ACCENTS = array(
+  'à' => 'a', 'ô' => 'o', 'ď' => 'd', 'ḟ' => 'f', 'ë' => 'e', 'š' => 's', 'ơ' => 'o',
+  'ß' => 'ss', 'ă' => 'a', 'ř' => 'r', 'ț' => 't', 'ň' => 'n', 'ā' => 'a', 'ķ' => 'k',
+  'ŝ' => 's', 'ỳ' => 'y', 'ņ' => 'n', 'ĺ' => 'l', 'ħ' => 'h', 'ṗ' => 'p', 'ó' => 'o',
+  'ú' => 'u', 'ě' => 'e', 'é' => 'e', 'ç' => 'c', 'ẁ' => 'w', 'ċ' => 'c', 'õ' => 'o',
+  'ṡ' => 's', 'ø' => 'o', 'ģ' => 'g', 'ŧ' => 't', 'ș' => 's', 'ė' => 'e', 'ĉ' => 'c',
+  'ś' => 's', 'î' => 'i', 'ű' => 'u', 'ć' => 'c', 'ę' => 'e', 'ŵ' => 'w', 'ṫ' => 't',
+  'ū' => 'u', 'č' => 'c', 'ö' => 'oe', 'è' => 'e', 'ŷ' => 'y', 'ą' => 'a', 'ł' => 'l',
+  'ų' => 'u', 'ů' => 'u', 'ş' => 's', 'ğ' => 'g', 'ļ' => 'l', 'ƒ' => 'f', 'ž' => 'z',
+  'ẃ' => 'w', 'ḃ' => 'b', 'å' => 'a', 'ì' => 'i', 'ï' => 'i', 'ḋ' => 'd', 'ť' => 't',
+  'ŗ' => 'r', 'ä' => 'ae', 'í' => 'i', 'ŕ' => 'r', 'ê' => 'e', 'ü' => 'ue', 'ò' => 'o',
+  'ē' => 'e', 'ñ' => 'n', 'ń' => 'n', 'ĥ' => 'h', 'ĝ' => 'g', 'đ' => 'd', 'ĵ' => 'j',
+  'ÿ' => 'y', 'ũ' => 'u', 'ŭ' => 'u', 'ư' => 'u', 'ţ' => 't', 'ý' => 'y', 'ő' => 'o',
+  'â' => 'a', 'ľ' => 'l', 'ẅ' => 'w', 'ż' => 'z', 'ī' => 'i', 'ã' => 'a', 'ġ' => 'g',
+  'ṁ' => 'm', 'ō' => 'o', 'ĩ' => 'i', 'ù' => 'u', 'į' => 'i', 'ź' => 'z', 'á' => 'a',
+  'û' => 'u', 'þ' => 'th', 'ð' => 'dh', 'æ' => 'ae', 'µ' => 'u', 'ĕ' => 'e', 
+            );
+        }
+        
+        $str = str_replace(
+                array_keys($UTF8_LOWER_ACCENTS),
+                array_values($UTF8_LOWER_ACCENTS),
+                $str
+            );
+    }
+    
+    if($case >= 0){
+        if ( is_null($UTF8_UPPER_ACCENTS) ) {
+            $UTF8_UPPER_ACCENTS = array(
+  'À' => 'A', 'Ô' => 'O', 'Ď' => 'D', 'Ḟ' => 'F', 'Ë' => 'E', 'Š' => 'S', 'Ơ' => 'O',
+  'Ă' => 'A', 'Ř' => 'R', 'Ț' => 'T', 'Ň' => 'N', 'Ā' => 'A', 'Ķ' => 'K',
+  'Ŝ' => 'S', 'Ỳ' => 'Y', 'Ņ' => 'N', 'Ĺ' => 'L', 'Ħ' => 'H', 'Ṗ' => 'P', 'Ó' => 'O',
+  'Ú' => 'U', 'Ě' => 'E', 'É' => 'E', 'Ç' => 'C', 'Ẁ' => 'W', 'Ċ' => 'C', 'Õ' => 'O',
+  'Ṡ' => 'S', 'Ø' => 'O', 'Ģ' => 'G', 'Ŧ' => 'T', 'Ș' => 'S', 'Ė' => 'E', 'Ĉ' => 'C',
+  'Ś' => 'S', 'Î' => 'I', 'Ű' => 'U', 'Ć' => 'C', 'Ę' => 'E', 'Ŵ' => 'W', 'Ṫ' => 'T',
+  'Ū' => 'U', 'Č' => 'C', 'Ö' => 'Oe', 'È' => 'E', 'Ŷ' => 'Y', 'Ą' => 'A', 'Ł' => 'L',
+  'Ų' => 'U', 'Ů' => 'U', 'Ş' => 'S', 'Ğ' => 'G', 'Ļ' => 'L', 'Ƒ' => 'F', 'Ž' => 'Z',
+  'Ẃ' => 'W', 'Ḃ' => 'B', 'Å' => 'A', 'Ì' => 'I', 'Ï' => 'I', 'Ḋ' => 'D', 'Ť' => 'T',
+  'Ŗ' => 'R', 'Ä' => 'Ae', 'Í' => 'I', 'Ŕ' => 'R', 'Ê' => 'E', 'Ü' => 'Ue', 'Ò' => 'O',
+  'Ē' => 'E', 'Ñ' => 'N', 'Ń' => 'N', 'Ĥ' => 'H', 'Ĝ' => 'G', 'Đ' => 'D', 'Ĵ' => 'J',
+  'Ÿ' => 'Y', 'Ũ' => 'U', 'Ŭ' => 'U', 'Ư' => 'U', 'Ţ' => 'T', 'Ý' => 'Y', 'Ő' => 'O',
+  'Â' => 'A', 'Ľ' => 'L', 'Ẅ' => 'W', 'Ż' => 'Z', 'Ī' => 'I', 'Ã' => 'A', 'Ġ' => 'G',
+  'Ṁ' => 'M', 'Ō' => 'O', 'Ĩ' => 'I', 'Ù' => 'U', 'Į' => 'I', 'Ź' => 'Z', 'Á' => 'A',
+  'Û' => 'U', 'Þ' => 'Th', 'Ð' => 'Dh', 'Æ' => 'Ae', 'Ĕ' => 'E',
+            );
+        }
+        $str = str_replace(
+                array_keys($UTF8_UPPER_ACCENTS),
+                array_values($UTF8_UPPER_ACCENTS),
+                $str
+            );
+    }
+    
+    return $str;
+    
+}

Added: plog/trunk/class/data/utf8/utils/bad.php
===================================================================
--- plog/trunk/class/data/utf8/utils/bad.php	                        (rev 0)
+++ plog/trunk/class/data/utf8/utils/bad.php	2007-07-19 18:22:10 UTC (rev 5685)
@@ -0,0 +1,421 @@
+<?php
+/**
+* @version $Id: bad.php,v 1.2 2006/02/26 13:20:44 harryf Exp $
+* Tools for locating / replacing bad bytes in UTF-8 strings
+* The Original Code is Mozilla Communicator client code.
+* The Initial Developer of the Original Code is
+* Netscape Communications Corporation.
+* Portions created by the Initial Developer are Copyright (C) 1998
+* the Initial Developer. All Rights Reserved.
+* Ported to PHP by Henri Sivonen (http://hsivonen.iki.fi)
+* Slight modifications to fit with phputf8 library by Harry Fuecks (hfuecks gmail com)
+* @see http://lxr.mozilla.org/seamonkey/source/intl/uconv/src/nsUTF8ToUnicode.cpp
+* @see http://lxr.mozilla.org/seamonkey/source/intl/uconv/src/nsUnicodeToUTF8.cpp
+* @see http://hsivonen.iki.fi/php-utf8/
+* @package utf8
+* @subpackage bad
+* @see utf8_is_valid
+*/
+
+//--------------------------------------------------------------------
+/**
+* Locates the first bad byte in a UTF-8 string returning it's
+* byte index in the string
+* PCRE Pattern to locate bad bytes in a UTF-8 string
+* Comes from W3 FAQ: Multilingual Forms
+* Note: modified to include full ASCII range including control chars
+* @see http://www.w3.org/International/questions/qa-forms-utf-8
+* @param string
+* @return mixed integer byte index or FALSE if no bad found
+* @package utf8
+* @subpackage bad
+*/
+function utf8_bad_find($str) {
+    $UTF8_BAD =
+    '([\x00-\x7F]'.                          # ASCII (including control chars)
+    '|[\xC2-\xDF][\x80-\xBF]'.               # non-overlong 2-byte
+    '|\xE0[\xA0-\xBF][\x80-\xBF]'.           # excluding overlongs
+    '|[\xE1-\xEC\xEE\xEF][\x80-\xBF]{2}'.    # straight 3-byte
+    '|\xED[\x80-\x9F][\x80-\xBF]'.           # excluding surrogates
+    '|\xF0[\x90-\xBF][\x80-\xBF]{2}'.        # planes 1-3
+    '|[\xF1-\xF3][\x80-\xBF]{3}'.            # planes 4-15
+    '|\xF4[\x80-\x8F][\x80-\xBF]{2}'.        # plane 16
+    '|(.{1}))';                              # invalid byte
+    $pos = 0;
+    $badList = array();
+    while (preg_match('/'.$UTF8_BAD.'/S', $str, $matches)) {
+        $bytes = strlen($matches[0]);
+        if ( isset($matches[2])) {
+            return $pos;
+        }
+        $pos += $bytes;
+        $str = substr($str,$bytes);
+    }
+    return FALSE;
+}
+
+//--------------------------------------------------------------------
+/**
+* Locates all bad bytes in a UTF-8 string and returns a list of their
+* byte index in the string
+* PCRE Pattern to locate bad bytes in a UTF-8 string
+* Comes from W3 FAQ: Multilingual Forms
+* Note: modified to include full ASCII range including control chars
+* @see http://www.w3.org/International/questions/qa-forms-utf-8
+* @param string
+* @return mixed array of integers or FALSE if no bad found
+* @package utf8
+* @subpackage bad
+*/
+function utf8_bad_findall($str) {
+    $UTF8_BAD =
+    '([\x00-\x7F]'.                          # ASCII (including control chars)
+    '|[\xC2-\xDF][\x80-\xBF]'.               # non-overlong 2-byte
+    '|\xE0[\xA0-\xBF][\x80-\xBF]'.           # excluding overlongs
+    '|[\xE1-\xEC\xEE\xEF][\x80-\xBF]{2}'.    # straight 3-byte
+    '|\xED[\x80-\x9F][\x80-\xBF]'.           # excluding surrogates
+    '|\xF0[\x90-\xBF][\x80-\xBF]{2}'.        # planes 1-3
+    '|[\xF1-\xF3][\x80-\xBF]{3}'.            # planes 4-15
+    '|\xF4[\x80-\x8F][\x80-\xBF]{2}'.        # plane 16
+    '|(.{1}))';                              # invalid byte
+    $pos = 0;
+    $badList = array();
+    while (preg_match('/'.$UTF8_BAD.'/S', $str, $matches)) {
+        $bytes = strlen($matches[0]);
+        if ( isset($matches[2])) {
+            $badList[] = $pos;
+        }
+        $pos += $bytes;
+        $str = substr($str,$bytes);
+    }
+    if ( count($badList) > 0 ) {
+        return $badList;
+    }
+    return FALSE;
+}
+
+//--------------------------------------------------------------------
+/**
+* Strips out any bad bytes from a UTF-8 string and returns the rest
+* PCRE Pattern to locate bad bytes in a UTF-8 string
+* Comes from W3 FAQ: Multilingual Forms
+* Note: modified to include full ASCII range including control chars
+* @see http://www.w3.org/International/questions/qa-forms-utf-8
+* @param string
+* @return string
+* @package utf8
+* @subpackage bad
+*/
+function utf8_bad_strip($str) {
+    $UTF8_BAD =
+    '([\x00-\x7F]'.                          # ASCII (including control chars)
+    '|[\xC2-\xDF][\x80-\xBF]'.               # non-overlong 2-byte
+    '|\xE0[\xA0-\xBF][\x80-\xBF]'.           # excluding overlongs
+    '|[\xE1-\xEC\xEE\xEF][\x80-\xBF]{2}'.    # straight 3-byte
+    '|\xED[\x80-\x9F][\x80-\xBF]'.           # excluding surrogates
+    '|\xF0[\x90-\xBF][\x80-\xBF]{2}'.        # planes 1-3
+    '|[\xF1-\xF3][\x80-\xBF]{3}'.            # planes 4-15
+    '|\xF4[\x80-\x8F][\x80-\xBF]{2}'.        # plane 16
+    '|(.{1}))';                              # invalid byte
+    ob_start();
+    while (preg_match('/'.$UTF8_BAD.'/S', $str, $matches)) {
+        if ( !isset($matches[2])) {
+            echo $matches[0];
+        }
+        $str = substr($str,strlen($matches[0]));
+    }
+    $result = ob_get_contents();
+    ob_end_clean();
+    return $result;
+}
+
+//--------------------------------------------------------------------
+/**
+* Replace bad bytes with an alternative character - ASCII character
+* recommended is replacement char
+* PCRE Pattern to locate bad bytes in a UTF-8 string
+* Comes from W3 FAQ: Multilingual Forms
+* Note: modified to include full ASCII range including control chars
+* @see http://www.w3.org/International/questions/qa-forms-utf-8
+* @param string to search
+* @param string to replace bad bytes with (defaults to '?') - use ASCII
+* @return string
+* @package utf8
+* @subpackage bad
+*/
+function utf8_bad_replace($str, $replace = '?') {
+    $UTF8_BAD =
+    '([\x00-\x7F]'.                          # ASCII (including control chars)
+    '|[\xC2-\xDF][\x80-\xBF]'.               # non-overlong 2-byte
+    '|\xE0[\xA0-\xBF][\x80-\xBF]'.           # excluding overlongs
+    '|[\xE1-\xEC\xEE\xEF][\x80-\xBF]{2}'.    # straight 3-byte
+    '|\xED[\x80-\x9F][\x80-\xBF]'.           # excluding surrogates
+    '|\xF0[\x90-\xBF][\x80-\xBF]{2}'.        # planes 1-3
+    '|[\xF1-\xF3][\x80-\xBF]{3}'.            # planes 4-15
+    '|\xF4[\x80-\x8F][\x80-\xBF]{2}'.        # plane 16
+    '|(.{1}))';                              # invalid byte
+    ob_start();
+    while (preg_match('/'.$UTF8_BAD.'/S', $str, $matches)) {
+        if ( !isset($matches[2])) {
+            echo $matches[0];
+        } else {
+            echo $replace;
+        }
+        $str = substr($str,strlen($matches[0]));
+    }
+    $result = ob_get_contents();
+    ob_end_clean();
+    return $result;
+}
+
+//--------------------------------------------------------------------
+/**
+* Return code from utf8_bad_identify() when a five octet sequence is detected.
+* Note: 5 octets sequences are valid UTF-8 but are not supported by Unicode so
+* do not represent a useful character
+* @see utf8_bad_identify
+* @package utf8
+* @subpackage bad
+*/
+define('UTF8_BAD_5OCTET',1);
+
+/**
+* Return code from utf8_bad_identify() when a six octet sequence is detected.
+* Note: 6 octets sequences are valid UTF-8 but are not supported by Unicode so
+* do not represent a useful character
+* @see utf8_bad_identify
+* @package utf8
+* @subpackage bad
+*/
+define('UTF8_BAD_6OCTET',2);
+
+/**
+* Return code from utf8_bad_identify().
+* Invalid octet for use as start of multi-byte UTF-8 sequence
+* @see utf8_bad_identify
+* @package utf8
+* @subpackage bad
+*/
+define('UTF8_BAD_SEQID',3);
+
+/**
+* Return code from utf8_bad_identify().
+* From Unicode 3.1, non-shortest form is illegal
+* @see utf8_bad_identify
+* @package utf8
+* @subpackage bad
+*/
+define('UTF8_BAD_NONSHORT',4);
+
+/**
+* Return code from utf8_bad_identify().
+* From Unicode 3.2, surrogate characters are illegal
+* @see utf8_bad_identify
+* @package utf8
+* @subpackage bad
+*/
+define('UTF8_BAD_SURROGATE',5);
+
+/**
+* Return code from utf8_bad_identify().
+* Codepoints outside the Unicode range are illegal
+* @see utf8_bad_identify
+* @package utf8
+* @subpackage bad
+*/
+define('UTF8_BAD_UNIOUTRANGE',6);
+
+/**
+* Return code from utf8_bad_identify().
+* Incomplete multi-octet sequence
+* Note: this is kind of a "catch-all"
+* @see utf8_bad_identify
+* @package utf8
+* @subpackage bad
+*/
+define('UTF8_BAD_SEQINCOMPLETE',7);
+
+//--------------------------------------------------------------------
+/**
+* Reports on the type of bad byte found in a UTF-8 string. Returns a
+* status code on the first bad byte found
+* @author <hsivonen at iki.fi>
+* @param string UTF-8 encoded string
+* @return mixed integer constant describing problem or FALSE if valid UTF-8
+* @see utf8_bad_explain
+* @see http://hsivonen.iki.fi/php-utf8/
+* @package utf8
+* @subpackage bad
+*/
+function utf8_bad_identify($str, &$i) {
+    
+    $mState = 0;     // cached expected number of octets after the current octet
+                     // until the beginning of the next UTF8 character sequence
+    $mUcs4  = 0;     // cached Unicode character
+    $mBytes = 1;     // cached expected number of octets in the current sequence
+    
+    $len = strlen($str);
+    
+    for($i = 0; $i < $len; $i++) {
+        
+        $in = ord($str{$i});
+        
+        if ( $mState == 0) {
+            
+            // When mState is zero we expect either a US-ASCII character or a
+            // multi-octet sequence.
+            if (0 == (0x80 & ($in))) {
+                // US-ASCII, pass straight through.
+                $mBytes = 1;
+                
+            } else if (0xC0 == (0xE0 & ($in))) {
+                // First octet of 2 octet sequence
+                $mUcs4 = ($in);
+                $mUcs4 = ($mUcs4 & 0x1F) << 6;
+                $mState = 1;
+                $mBytes = 2;
+                
+            } else if (0xE0 == (0xF0 & ($in))) {
+                // First octet of 3 octet sequence
+                $mUcs4 = ($in);
+                $mUcs4 = ($mUcs4 & 0x0F) << 12;
+                $mState = 2;
+                $mBytes = 3;
+                
+            } else if (0xF0 == (0xF8 & ($in))) {
+                // First octet of 4 octet sequence
+                $mUcs4 = ($in);
+                $mUcs4 = ($mUcs4 & 0x07) << 18;
+                $mState = 3;
+                $mBytes = 4;
+                
+            } else if (0xF8 == (0xFC & ($in))) {
+                
+                /* First octet of 5 octet sequence.
+                *
+                * This is illegal because the encoded codepoint must be either
+                * (a) not the shortest form or
+                * (b) outside the Unicode range of 0-0x10FFFF.
+                */
+                
+                return UTF8_BAD_5OCTET;
+                
+            } else if (0xFC == (0xFE & ($in))) {
+                
+                // First octet of 6 octet sequence, see comments for 5 octet sequence.
+                return UTF8_BAD_6OCTET;
+                
+            } else {
+                // Current octet is neither in the US-ASCII range nor a legal first
+                // octet of a multi-octet sequence.
+                return UTF8_BAD_SEQID;
+                
+            }
+        
+        } else {
+            
+            // When mState is non-zero, we expect a continuation of the multi-octet
+            // sequence
+            if (0x80 == (0xC0 & ($in))) {
+                
+                // Legal continuation.
+                $shift = ($mState - 1) * 6;
+                $tmp = $in;
+                $tmp = ($tmp & 0x0000003F) << $shift;
+                $mUcs4 |= $tmp;
+            
+                /**
+                * End of the multi-octet sequence. mUcs4 now contains the final
+                * Unicode codepoint to be output
+                */
+                if (0 == --$mState) {
+                    
+                    // From Unicode 3.1, non-shortest form is illegal
+                    if (((2 == $mBytes) && ($mUcs4 < 0x0080)) ||
+                        ((3 == $mBytes) && ($mUcs4 < 0x0800)) ||
+                        ((4 == $mBytes) && ($mUcs4 < 0x10000)) ) {
+                        return UTF8_BAD_NONSHORT;
+                        
+                    // From Unicode 3.2, surrogate characters are illegal
+                    } else if (($mUcs4 & 0xFFFFF800) == 0xD800) {
+                        return UTF8_BAD_SURROGATE;
+                        
+                    // Codepoints outside the Unicode range are illegal
+                    } else if ($mUcs4 > 0x10FFFF) {
+                        return UTF8_BAD_UNIOUTRANGE;
+                    }
+                    
+                    //initialize UTF8 cache
+                    $mState = 0;
+                    $mUcs4  = 0;
+                    $mBytes = 1;
+                }
+            
+            } else {
+                // ((0xC0 & (*in) != 0x80) && (mState != 0))
+                // Incomplete multi-octet sequence.
+                $i--;
+                return UTF8_BAD_SEQINCOMPLETE;
+            }
+        }
+    }
+    
+    if ( $mState != 0 ) {
+        // Incomplete multi-octet sequence.
+        $i--;
+        return UTF8_BAD_SEQINCOMPLETE;
+    }
+    
+    // No bad octets found
+    $i = NULL;
+    return FALSE;
+}
+
+//--------------------------------------------------------------------
+/**
+* Takes a return code from utf8_bad_identify() are returns a message
+* (in English) explaining what the problem is.
+* @param int return code from utf8_bad_identify
+* @return mixed string message or FALSE if return code unknown
+* @see utf8_bad_identify
+* @package utf8
+* @subpackage bad
+*/
+function utf8_bad_explain($code) {
+    
+    switch ($code) {
+        
+        case UTF8_BAD_5OCTET:
+            return 'Five octet sequences are valid UTF-8 but are not supported by Unicode';
+        break;
+        
+        case UTF8_BAD_6OCTET:
+            return 'Six octet sequences are valid UTF-8 but are not supported by Unicode';
+        break;
+        
+        case UTF8_BAD_SEQID:
+            return 'Invalid octet for use as start of multi-byte UTF-8 sequence';
+        break;
+        
+        case UTF8_BAD_NONSHORT:
+            return 'From Unicode 3.1, non-shortest form is illegal';
+        break;
+        
+        case UTF8_BAD_SURROGATE:
+            return 'From Unicode 3.2, surrogate characters are illegal';
+        break;
+        
+        case UTF8_BAD_UNIOUTRANGE:
+            return 'Codepoints outside the Unicode range are illegal';
+        break;
+        
+        case UTF8_BAD_SEQINCOMPLETE:
+            return 'Incomplete multi-octet sequence';
+        break;
+        
+    }
+    
+    trigger_error('Unknown error code: '.$code,E_USER_WARNING);
+    return FALSE;
+    
+}

Added: plog/trunk/class/data/utf8/utils/patterns.php
===================================================================
--- plog/trunk/class/data/utf8/utils/patterns.php	                        (rev 0)
+++ plog/trunk/class/data/utf8/utils/patterns.php	2007-07-19 18:22:10 UTC (rev 5685)
@@ -0,0 +1,69 @@
+<?php
+/**
+* PCRE Regular expressions for UTF-8. Note this file is not actually used by
+* the rest of the library but these regular expressions can be useful to have
+* available.
+* @version $Id: patterns.php,v 1.1 2006/02/25 14:20:02 harryf Exp $
+* @see http://www.w3.org/International/questions/qa-forms-utf-8
+* @package utf8
+* @subpackage patterns
+*/
+
+//--------------------------------------------------------------------
+/**
+* PCRE Pattern to check a UTF-8 string is valid
+* Comes from W3 FAQ: Multilingual Forms
+* Note: modified to include full ASCII range including control chars
+* @see http://www.w3.org/International/questions/qa-forms-utf-8
+* @package utf8
+* @subpackage patterns
+*/
+$UTF8_VALID = '^('.
+    '[\x00-\x7F]'.                          # ASCII (including control chars)
+    '|[\xC2-\xDF][\x80-\xBF]'.              # non-overlong 2-byte
+    '|\xE0[\xA0-\xBF][\x80-\xBF]'.          # excluding overlongs
+    '|[\xE1-\xEC\xEE\xEF][\x80-\xBF]{2}'.   # straight 3-byte
+    '|\xED[\x80-\x9F][\x80-\xBF]'.          # excluding surrogates
+    '|\xF0[\x90-\xBF][\x80-\xBF]{2}'.       # planes 1-3
+    '|[\xF1-\xF3][\x80-\xBF]{3}'.           # planes 4-15
+    '|\xF4[\x80-\x8F][\x80-\xBF]{2}'.       # plane 16
+    ')*$';
+
+//--------------------------------------------------------------------
+/**
+* PCRE Pattern to match single UTF-8 characters
+* Comes from W3 FAQ: Multilingual Forms
+* Note: modified to include full ASCII range including control chars
+* @see http://www.w3.org/International/questions/qa-forms-utf-8
+* @package utf8
+* @subpackage patterns
+*/
+$UTF8_MATCH =
+    '([\x00-\x7F])'.                          # ASCII (including control chars)
+    '|([\xC2-\xDF][\x80-\xBF])'.              # non-overlong 2-byte
+    '|(\xE0[\xA0-\xBF][\x80-\xBF])'.          # excluding overlongs
+    '|([\xE1-\xEC\xEE\xEF][\x80-\xBF]{2})'.   # straight 3-byte
+    '|(\xED[\x80-\x9F][\x80-\xBF])'.          # excluding surrogates
+    '|(\xF0[\x90-\xBF][\x80-\xBF]{2})'.       # planes 1-3
+    '|([\xF1-\xF3][\x80-\xBF]{3})'.           # planes 4-15
+    '|(\xF4[\x80-\x8F][\x80-\xBF]{2})';       # plane 16
+
+//--------------------------------------------------------------------
+/**
+* PCRE Pattern to locate bad bytes in a UTF-8 string
+* Comes from W3 FAQ: Multilingual Forms
+* Note: modified to include full ASCII range including control chars
+* @see http://www.w3.org/International/questions/qa-forms-utf-8
+* @package utf8
+* @subpackage patterns
+*/
+$UTF8_BAD =
+    '([\x00-\x7F]'.                          # ASCII (including control chars)
+    '|[\xC2-\xDF][\x80-\xBF]'.               # non-overlong 2-byte
+    '|\xE0[\xA0-\xBF][\x80-\xBF]'.           # excluding overlongs
+    '|[\xE1-\xEC\xEE\xEF][\x80-\xBF]{2}'.    # straight 3-byte
+    '|\xED[\x80-\x9F][\x80-\xBF]'.           # excluding surrogates
+    '|\xF0[\x90-\xBF][\x80-\xBF]{2}'.        # planes 1-3
+    '|[\xF1-\xF3][\x80-\xBF]{3}'.            # planes 4-15
+    '|\xF4[\x80-\x8F][\x80-\xBF]{2}'.        # plane 16
+    '|(.{1}))';                              # invalid byte

Added: plog/trunk/class/data/utf8/utils/position.php
===================================================================
--- plog/trunk/class/data/utf8/utils/position.php	                        (rev 0)
+++ plog/trunk/class/data/utf8/utils/position.php	2007-07-19 18:22:10 UTC (rev 5685)
@@ -0,0 +1,173 @@
+<?php
+/**
+* Locate a byte index given a UTF-8 character index
+* @version $Id: position.php,v 1.1 2006/10/01 00:01:31 harryf Exp $
+* @package utf8
+* @subpackage position
+*/
+
+//--------------------------------------------------------------------
+/**
+* Given a string and a character index in the string, in
+* terms of the UTF-8 character position, returns the byte
+* index of that character. Can be useful when you want to
+* PHP's native string functions but we warned, locating
+* the byte can be expensive
+* Takes variable number of parameters - first must be
+* the search string then 1 to n UTF-8 character positions
+* to obtain byte indexes for - it is more efficient to search
+* the string for multiple characters at once, than make
+* repeated calls to this function
+*
+* @author Chris Smith<chris at jalakai.co.uk>
+* @param string string to locate index in
+* @param int (n times)
+* @return mixed - int if only one input int, array if more
+* @return boolean TRUE if it's all ASCII
+* @package utf8
+* @subpackage position
+*/
+function utf8_byte_position() {
+    
+    $args = func_get_args();
+    $str =& array_shift($args);
+    if (!is_string($str)) return false;
+    
+    $result = array();
+    
+    // trivial byte index, character offset pair
+    $prev = array(0,0);
+    
+    // use a short piece of str to estimate bytes per character
+    // $i (& $j) -> byte indexes into $str
+    $i = utf8_locate_next_chr($str, 300);
+    
+    // $c -> character offset into $str
+    $c = strlen(utf8_decode(substr($str,0,$i)));
+    
+    // deal with arguments from lowest to highest
+    sort($args);
+    
+    foreach ($args as $offset) {
+        // sanity checks FIXME
+        
+        // 0 is an easy check
+        if ($offset == 0) { $result[] = 0; continue; }
+        
+        // ensure no endless looping
+        $safety_valve = 50;
+        
+        do {
+            
+            if ( ($c - $prev[1]) == 0 ) {
+                // Hack: gone past end of string
+                $error = 0;
+                $i = strlen($str);
+                break;
+            }
+            
+            $j = $i + (int)(($offset-$c) * ($i - $prev[0]) / ($c - $prev[1]));
+            
+            // correct to utf8 character boundary
+            $j = utf8_locate_next_chr($str, $j);
+            
+            // save the index, offset for use next iteration
+            $prev = array($i,$c);
+            
+            if ($j > $i) {
+                // determine new character offset
+                $c += strlen(utf8_decode(substr($str,$i,$j-$i)));
+            } else {
+                // ditto
+                $c -= strlen(utf8_decode(substr($str,$j,$i-$j)));
+            }
+            
+            $error = abs($c-$offset);
+            
+            // ready for next time around
+            $i = $j;
+        
+        // from 7 it is faster to iterate over the string
+        } while ( ($error > 7) && --$safety_valve) ;
+        
+        if ($error && $error <= 7) {
+            
+            if ($c < $offset) {
+                // move up
+                while ($error--) { $i = utf8_locate_next_chr($str,++$i); }
+            } else {
+                // move down
+                while ($error--) { $i = utf8_locate_current_chr($str,--$i); }
+            }
+            
+            // ready for next arg
+            $c = $offset;
+        }
+        $result[] = $i;
+    }
+    
+    if ( count($result) == 1 ) {
+        return $result[0];
+    }
+    
+    return $result;
+}
+
+//--------------------------------------------------------------------
+/**
+* Given a string and any byte index, returns the byte index
+* of the start of the current UTF-8 character, relative to supplied
+* position. If the current character begins at the same place as the
+* supplied byte index, that byte index will be returned. Otherwise
+* this function will step backwards, looking for the index where
+* curent UTF-8 character begins
+* @author Chris Smith<chris at jalakai.co.uk>
+* @param string
+* @param int byte index in the string
+* @return int byte index of start of next UTF-8 character
+* @package utf8
+* @subpackage position
+*/
+function utf8_locate_current_chr( &$str, $idx ) {
+    
+    if ($idx <= 0) return 0;
+    
+    $limit = strlen($str);
+    if ($idx >= $limit) return $limit;
+    
+    // Binary value for any byte after the first in a multi-byte UTF-8 character
+    // will be like 10xxxxxx so & 0xC0 can be used to detect this kind
+    // of byte - assuming well formed UTF-8
+    while ($idx && ((ord($str[$idx]) & 0xC0) == 0x80)) $idx--;
+    
+    return $idx;
+}
+
+//--------------------------------------------------------------------
+/**
+* Given a string and any byte index, returns the byte index
+* of the start of the next UTF-8 character, relative to supplied
+* position. If the next character begins at the same place as the
+* supplied byte index, that byte index will be returned.
+* @author Chris Smith<chris at jalakai.co.uk>
+* @param string
+* @param int byte index in the string
+* @return int byte index of start of next UTF-8 character
+* @package utf8
+* @subpackage position
+*/
+function utf8_locate_next_chr( &$str, $idx ) {
+    
+    if ($idx <= 0) return 0;
+    
+    $limit = strlen($str);
+    if ($idx >= $limit) return $limit;
+    
+    // Binary value for any byte after the first in a multi-byte UTF-8 character
+    // will be like 10xxxxxx so & 0xC0 can be used to detect this kind
+    // of byte - assuming well formed UTF-8
+    while (($idx < $limit) && ((ord($str[$idx]) & 0xC0) == 0x80)) $idx++;
+    
+    return $idx;
+}
+

Added: plog/trunk/class/data/utf8/utils/specials.php
===================================================================
--- plog/trunk/class/data/utf8/utils/specials.php	                        (rev 0)
+++ plog/trunk/class/data/utf8/utils/specials.php	2007-07-19 18:22:10 UTC (rev 5685)
@@ -0,0 +1,131 @@
+<?php
+/**
+* Utilities for processing "special" characters in UTF-8. "Special" largely means anything which would
+* be regarded as a non-word character, like ASCII control characters and punctuation. This has a "Roman"
+* bias - it would be unaware of modern Chinese "punctuation" characters for example.
+* Note: requires utils/unicode.php to be loaded
+* @version $Id: specials.php,v 1.2 2006/10/16 21:13:59 harryf Exp $
+* @package utf8
+* @subpackage utils
+* @see utf8_is_valid
+*/
+
+//--------------------------------------------------------------------
+/**
+* Used internally. Builds a PCRE pattern from the $UTF8_SPECIAL_CHARS 
+* array defined in this file
+* The $UTF8_SPECIAL_CHARS should contain all special characters (non-letter/non-digit)
+* defined in the various local charsets - it's not a complete list of
+* non-alphanum characters in UTF-8. It's not perfect but should match most
+* cases of special chars.
+* This function adds the control chars 0x00 to 0x19 to the array of
+* special chars (they are not included in $UTF8_SPECIAL_CHARS)
+* @package utf8
+* @subpackage utils
+* @return string
+* @see utf8_from_unicode
+* @see utf8_is_word_chars
+* @see utf8_strip_specials
+*/
+function utf8_specials_pattern() {
+    static $pattern = NULL;
+    
+    if ( !$pattern ) {
+        $UTF8_SPECIAL_CHARS = array(
+    0x001a, 0x001b, 0x001c, 0x001d, 0x001e, 0x001f, 0x0020, 0x0021, 0x0022, 0x0023,
+    0x0024, 0x0025, 0x0026, 0x0027, 0x0028, 0x0029, 0x002a, 0x002b, 0x002c,
+    0x002f,         0x003b, 0x003c, 0x003d, 0x003e, 0x003f, 0x0040, 0x005b,
+    0x005c, 0x005d, 0x005e,         0x0060, 0x007b, 0x007c, 0x007d, 0x007e,
+    0x007f, 0x0080, 0x0081, 0x0082, 0x0083, 0x0084, 0x0085, 0x0086, 0x0087, 0x0088,
+    0x0089, 0x008a, 0x008b, 0x008c, 0x008d, 0x008e, 0x008f, 0x0090, 0x0091, 0x0092,
+    0x0093, 0x0094, 0x0095, 0x0096, 0x0097, 0x0098, 0x0099, 0x009a, 0x009b, 0x009c,
+    0x009d, 0x009e, 0x009f, 0x00a0, 0x00a1, 0x00a2, 0x00a3, 0x00a4, 0x00a5, 0x00a6,
+    0x00a7, 0x00a8, 0x00a9, 0x00aa, 0x00ab, 0x00ac, 0x00ad, 0x00ae, 0x00af, 0x00b0,
+    0x00b1, 0x00b2, 0x00b3, 0x00b4, 0x00b5, 0x00b6, 0x00b7, 0x00b8, 0x00b9, 0x00ba,
+    0x00bb, 0x00bc, 0x00bd, 0x00be, 0x00bf, 0x00d7, 0x00f7, 0x02c7, 0x02d8, 0x02d9,
+    0x02da, 0x02db, 0x02dc, 0x02dd, 0x0300, 0x0301, 0x0303, 0x0309, 0x0323, 0x0384,
+    0x0385, 0x0387, 0x03b2, 0x03c6, 0x03d1, 0x03d2, 0x03d5, 0x03d6, 0x05b0, 0x05b1,
+    0x05b2, 0x05b3, 0x05b4, 0x05b5, 0x05b6, 0x05b7, 0x05b8, 0x05b9, 0x05bb, 0x05bc,
+    0x05bd, 0x05be, 0x05bf, 0x05c0, 0x05c1, 0x05c2, 0x05c3, 0x05f3, 0x05f4, 0x060c,
+    0x061b, 0x061f, 0x0640, 0x064b, 0x064c, 0x064d, 0x064e, 0x064f, 0x0650, 0x0651,
+    0x0652, 0x066a, 0x0e3f, 0x200c, 0x200d, 0x200e, 0x200f, 0x2013, 0x2014, 0x2015,
+    0x2017, 0x2018, 0x2019, 0x201a, 0x201c, 0x201d, 0x201e, 0x2020, 0x2021, 0x2022,
+    0x2026, 0x2030, 0x2032, 0x2033, 0x2039, 0x203a, 0x2044, 0x20a7, 0x20aa, 0x20ab,
+    0x20ac, 0x2116, 0x2118, 0x2122, 0x2126, 0x2135, 0x2190, 0x2191, 0x2192, 0x2193,
+    0x2194, 0x2195, 0x21b5, 0x21d0, 0x21d1, 0x21d2, 0x21d3, 0x21d4, 0x2200, 0x2202,
+    0x2203, 0x2205, 0x2206, 0x2207, 0x2208, 0x2209, 0x220b, 0x220f, 0x2211, 0x2212,
+    0x2215, 0x2217, 0x2219, 0x221a, 0x221d, 0x221e, 0x2220, 0x2227, 0x2228, 0x2229,
+    0x222a, 0x222b, 0x2234, 0x223c, 0x2245, 0x2248, 0x2260, 0x2261, 0x2264, 0x2265,
+    0x2282, 0x2283, 0x2284, 0x2286, 0x2287, 0x2295, 0x2297, 0x22a5, 0x22c5, 0x2310,
+    0x2320, 0x2321, 0x2329, 0x232a, 0x2469, 0x2500, 0x2502, 0x250c, 0x2510, 0x2514,
+    0x2518, 0x251c, 0x2524, 0x252c, 0x2534, 0x253c, 0x2550, 0x2551, 0x2552, 0x2553,
+    0x2554, 0x2555, 0x2556, 0x2557, 0x2558, 0x2559, 0x255a, 0x255b, 0x255c, 0x255d,
+    0x255e, 0x255f, 0x2560, 0x2561, 0x2562, 0x2563, 0x2564, 0x2565, 0x2566, 0x2567,
+    0x2568, 0x2569, 0x256a, 0x256b, 0x256c, 0x2580, 0x2584, 0x2588, 0x258c, 0x2590,
+    0x2591, 0x2592, 0x2593, 0x25a0, 0x25b2, 0x25bc, 0x25c6, 0x25ca, 0x25cf, 0x25d7,
+    0x2605, 0x260e, 0x261b, 0x261e, 0x2660, 0x2663, 0x2665, 0x2666, 0x2701, 0x2702,
+    0x2703, 0x2704, 0x2706, 0x2707, 0x2708, 0x2709, 0x270c, 0x270d, 0x270e, 0x270f,
+    0x2710, 0x2711, 0x2712, 0x2713, 0x2714, 0x2715, 0x2716, 0x2717, 0x2718, 0x2719,
+    0x271a, 0x271b, 0x271c, 0x271d, 0x271e, 0x271f, 0x2720, 0x2721, 0x2722, 0x2723,
+    0x2724, 0x2725, 0x2726, 0x2727, 0x2729, 0x272a, 0x272b, 0x272c, 0x272d, 0x272e,
+    0x272f, 0x2730, 0x2731, 0x2732, 0x2733, 0x2734, 0x2735, 0x2736, 0x2737, 0x2738,
+    0x2739, 0x273a, 0x273b, 0x273c, 0x273d, 0x273e, 0x273f, 0x2740, 0x2741, 0x2742,
+    0x2743, 0x2744, 0x2745, 0x2746, 0x2747, 0x2748, 0x2749, 0x274a, 0x274b, 0x274d,
+    0x274f, 0x2750, 0x2751, 0x2752, 0x2756, 0x2758, 0x2759, 0x275a, 0x275b, 0x275c,
+    0x275d, 0x275e, 0x2761, 0x2762, 0x2763, 0x2764, 0x2765, 0x2766, 0x2767, 0x277f,
+    0x2789, 0x2793, 0x2794, 0x2798, 0x2799, 0x279a, 0x279b, 0x279c, 0x279d, 0x279e,
+    0x279f, 0x27a0, 0x27a1, 0x27a2, 0x27a3, 0x27a4, 0x27a5, 0x27a6, 0x27a7, 0x27a8,
+    0x27a9, 0x27aa, 0x27ab, 0x27ac, 0x27ad, 0x27ae, 0x27af, 0x27b1, 0x27b2, 0x27b3,
+    0x27b4, 0x27b5, 0x27b6, 0x27b7, 0x27b8, 0x27b9, 0x27ba, 0x27bb, 0x27bc, 0x27bd,
+    0x27be, 0xf6d9, 0xf6da, 0xf6db, 0xf8d7, 0xf8d8, 0xf8d9, 0xf8da, 0xf8db, 0xf8dc,
+    0xf8dd, 0xf8de, 0xf8df, 0xf8e0, 0xf8e1, 0xf8e2, 0xf8e3, 0xf8e4, 0xf8e5, 0xf8e6,
+    0xf8e7, 0xf8e8, 0xf8e9, 0xf8ea, 0xf8eb, 0xf8ec, 0xf8ed, 0xf8ee, 0xf8ef, 0xf8f0,
+    0xf8f1, 0xf8f2, 0xf8f3, 0xf8f4, 0xf8f5, 0xf8f6, 0xf8f7, 0xf8f8, 0xf8f9, 0xf8fa,
+    0xf8fb, 0xf8fc, 0xf8fd, 0xf8fe, 0xfe7c, 0xfe7d,
+            );
+        $pattern = preg_quote(utf8_from_unicode($UTF8_SPECIAL_CHARS), '/');
+        $pattern = '/[\x00-\x19'.$pattern.']/u';
+    }
+    
+    return $pattern;
+}
+
+//--------------------------------------------------------------------
+/**
+* Checks a string for whether it contains only word characters. This
+* is logically equivalent to the \w PCRE meta character. Note that
+* this is not a 100% guarantee that the string only contains alpha /
+* numeric characters but just that common non-alphanumeric are not
+* in the string, including ASCII device control characters.
+* @package utf8
+* @subpackage utils
+* @param string to check
+* @return boolean TRUE if the string only contains word characters
+* @see utf8_specials_pattern
+*/
+function utf8_is_word_chars($str) {
+    return !(bool)preg_match(utf8_specials_pattern(),$str);
+}
+
+//--------------------------------------------------------------------
+/**
+* Removes special characters (nonalphanumeric) from a UTF-8 string
+* 
+* This can be useful as a helper for sanitizing a string for use as
+* something like a file name or a unique identifier. Be warned though
+* it does not handle all possible non-alphanumeric characters and is
+* not intended is some kind of security / injection filter.
+*
+* @package utf8
+* @subpackage utils
+* @author Andreas Gohr <andi at splitbrain.org>
+* @param string $string The UTF8 string to strip of special chars
+* @param string (optional) $repl   Replace special with this string
+* @return string with common non-alphanumeric characters removed
+* @see utf8_specials_pattern
+*/
+function utf8_strip_specials($string, $repl=''){
+    return preg_replace(utf8_specials_pattern(), $repl, $string);
+}
+
+

Added: plog/trunk/class/data/utf8/utils/unicode.php
===================================================================
--- plog/trunk/class/data/utf8/utils/unicode.php	                        (rev 0)
+++ plog/trunk/class/data/utf8/utils/unicode.php	2007-07-19 18:22:10 UTC (rev 5685)
@@ -0,0 +1,269 @@
+<?php
+/**
+* @version $Id: unicode.php,v 1.2 2006/02/26 13:20:44 harryf Exp $
+* Tools for conversion between UTF-8 and unicode
+* The Original Code is Mozilla Communicator client code.
+* The Initial Developer of the Original Code is
+* Netscape Communications Corporation.
+* Portions created by the Initial Developer are Copyright (C) 1998
+* the Initial Developer. All Rights Reserved.
+* Ported to PHP by Henri Sivonen (http://hsivonen.iki.fi)
+* Slight modifications to fit with phputf8 library by Harry Fuecks (hfuecks gmail com)
+* @see http://lxr.mozilla.org/seamonkey/source/intl/uconv/src/nsUTF8ToUnicode.cpp
+* @see http://lxr.mozilla.org/seamonkey/source/intl/uconv/src/nsUnicodeToUTF8.cpp
+* @see http://hsivonen.iki.fi/php-utf8/
+* @package utf8
+* @subpackage unicode
+*/
+
+//--------------------------------------------------------------------
+/**
+* Takes an UTF-8 string and returns an array of ints representing the 
+* Unicode characters. Astral planes are supported ie. the ints in the
+* output can be > 0xFFFF. Occurrances of the BOM are ignored. Surrogates
+* are not allowed.
+* Returns false if the input string isn't a valid UTF-8 octet sequence
+* and raises a PHP error at level E_USER_WARNING
+* Note: this function has been modified slightly in this library to
+* trigger errors on encountering bad bytes
+* @author <hsivonen at iki.fi>
+* @param string UTF-8 encoded string
+* @return mixed array of unicode code points or FALSE if UTF-8 invalid
+* @see utf8_from_unicode
+* @see http://hsivonen.iki.fi/php-utf8/
+* @package utf8
+* @subpackage unicode
+*/
+function utf8_to_unicode($str) {
+    $mState = 0;     // cached expected number of octets after the current octet
+                     // until the beginning of the next UTF8 character sequence
+    $mUcs4  = 0;     // cached Unicode character
+    $mBytes = 1;     // cached expected number of octets in the current sequence
+    
+    $out = array();
+    
+    $len = strlen($str);
+    
+    for($i = 0; $i < $len; $i++) {
+        
+        $in = ord($str{$i});
+        
+        if ( $mState == 0) {
+            
+            // When mState is zero we expect either a US-ASCII character or a
+            // multi-octet sequence.
+            if (0 == (0x80 & ($in))) {
+                // US-ASCII, pass straight through.
+                $out[] = $in;
+                $mBytes = 1;
+                
+            } else if (0xC0 == (0xE0 & ($in))) {
+                // First octet of 2 octet sequence
+                $mUcs4 = ($in);
+                $mUcs4 = ($mUcs4 & 0x1F) << 6;
+                $mState = 1;
+                $mBytes = 2;
+                
+            } else if (0xE0 == (0xF0 & ($in))) {
+                // First octet of 3 octet sequence
+                $mUcs4 = ($in);
+                $mUcs4 = ($mUcs4 & 0x0F) << 12;
+                $mState = 2;
+                $mBytes = 3;
+                
+            } else if (0xF0 == (0xF8 & ($in))) {
+                // First octet of 4 octet sequence
+                $mUcs4 = ($in);
+                $mUcs4 = ($mUcs4 & 0x07) << 18;
+                $mState = 3;
+                $mBytes = 4;
+                
+            } else if (0xF8 == (0xFC & ($in))) {
+                /* First octet of 5 octet sequence.
+                *
+                * This is illegal because the encoded codepoint must be either
+                * (a) not the shortest form or
+                * (b) outside the Unicode range of 0-0x10FFFF.
+                * Rather than trying to resynchronize, we will carry on until the end
+                * of the sequence and let the later error handling code catch it.
+                */
+                $mUcs4 = ($in);
+                $mUcs4 = ($mUcs4 & 0x03) << 24;
+                $mState = 4;
+                $mBytes = 5;
+                
+            } else if (0xFC == (0xFE & ($in))) {
+                // First octet of 6 octet sequence, see comments for 5 octet sequence.
+                $mUcs4 = ($in);
+                $mUcs4 = ($mUcs4 & 1) << 30;
+                $mState = 5;
+                $mBytes = 6;
+                
+            } else {
+                /* Current octet is neither in the US-ASCII range nor a legal first
+                 * octet of a multi-octet sequence.
+                 */
+                trigger_error(
+                        'utf8_to_unicode: Illegal sequence identifier '.
+                            'in UTF-8 at byte '.$i,
+                        E_USER_WARNING
+                    );
+                return FALSE;
+                
+            }
+        
+        } else {
+            
+            // When mState is non-zero, we expect a continuation of the multi-octet
+            // sequence
+            if (0x80 == (0xC0 & ($in))) {
+                
+                // Legal continuation.
+                $shift = ($mState - 1) * 6;
+                $tmp = $in;
+                $tmp = ($tmp & 0x0000003F) << $shift;
+                $mUcs4 |= $tmp;
+            
+                /**
+                * End of the multi-octet sequence. mUcs4 now contains the final
+                * Unicode codepoint to be output
+                */
+                if (0 == --$mState) {
+                    
+                    /*
+                    * Check for illegal sequences and codepoints.
+                    */
+                    // From Unicode 3.1, non-shortest form is illegal
+                    if (((2 == $mBytes) && ($mUcs4 < 0x0080)) ||
+                        ((3 == $mBytes) && ($mUcs4 < 0x0800)) ||
+                        ((4 == $mBytes) && ($mUcs4 < 0x10000)) ||
+                        (4 < $mBytes) ||
+                        // From Unicode 3.2, surrogate characters are illegal
+                        (($mUcs4 & 0xFFFFF800) == 0xD800) ||
+                        // Codepoints outside the Unicode range are illegal
+                        ($mUcs4 > 0x10FFFF)) {
+                        
+                        trigger_error(
+                                'utf8_to_unicode: Illegal sequence or codepoint '.
+                                    'in UTF-8 at byte '.$i,
+                                E_USER_WARNING
+                            );
+                        
+                        return FALSE;
+                        
+                    }
+                    
+                    if (0xFEFF != $mUcs4) {
+                        // BOM is legal but we don't want to output it
+                        $out[] = $mUcs4;
+                    }
+                    
+                    //initialize UTF8 cache
+                    $mState = 0;
+                    $mUcs4  = 0;
+                    $mBytes = 1;
+                }
+            
+            } else {
+                /**
+                *((0xC0 & (*in) != 0x80) && (mState != 0))
+                * Incomplete multi-octet sequence.
+                */
+                trigger_error(
+                        'utf8_to_unicode: Incomplete multi-octet '.
+                        '   sequence in UTF-8 at byte '.$i,
+                        E_USER_WARNING
+                    );
+                
+                return FALSE;
+            }
+        }
+    }
+    return $out;
+}
+
+//--------------------------------------------------------------------
+/**
+* Takes an array of ints representing the Unicode characters and returns 
+* a UTF-8 string. Astral planes are supported ie. the ints in the
+* input can be > 0xFFFF. Occurrances of the BOM are ignored. Surrogates
+* are not allowed.
+* Returns false if the input array contains ints that represent 
+* surrogates or are outside the Unicode range
+* and raises a PHP error at level E_USER_WARNING
+* Note: this function has been modified slightly in this library to use
+* output buffering to concatenate the UTF-8 string (faster) as well as
+* reference the array by it's keys
+* @param array of unicode code points representing a string
+* @return mixed UTF-8 string or FALSE if array contains invalid code points
+* @author <hsivonen at iki.fi>
+* @see utf8_to_unicode
+* @see http://hsivonen.iki.fi/php-utf8/
+* @package utf8
+* @subpackage unicode
+*/
+function utf8_from_unicode($arr) {
+    ob_start();
+    
+    foreach (array_keys($arr) as $k) {
+        
+        # ASCII range (including control chars)
+        if ( ($arr[$k] >= 0) && ($arr[$k] <= 0x007f) ) {
+            
+            echo chr($arr[$k]);
+        
+        # 2 byte sequence
+        } else if ($arr[$k] <= 0x07ff) {
+            
+            echo chr(0xc0 | ($arr[$k] >> 6));
+            echo chr(0x80 | ($arr[$k] & 0x003f));
+        
+        # Byte order mark (skip)
+        } else if($arr[$k] == 0xFEFF) {
+            
+            // nop -- zap the BOM
+        
+        # Test for illegal surrogates
+        } else if ($arr[$k] >= 0xD800 && $arr[$k] <= 0xDFFF) {
+            
+            // found a surrogate
+            trigger_error(
+                'utf8_from_unicode: Illegal surrogate '.
+                    'at index: '.$k.', value: '.$arr[$k],
+                E_USER_WARNING
+                );
+            
+            return FALSE;
+        
+        # 3 byte sequence
+        } else if ($arr[$k] <= 0xffff) {
+            
+            echo chr(0xe0 | ($arr[$k] >> 12));
+            echo chr(0x80 | (($arr[$k] >> 6) & 0x003f));
+            echo chr(0x80 | ($arr[$k] & 0x003f));
+        
+        # 4 byte sequence
+        } else if ($arr[$k] <= 0x10ffff) {
+            
+            echo chr(0xf0 | ($arr[$k] >> 18));
+            echo chr(0x80 | (($arr[$k] >> 12) & 0x3f));
+            echo chr(0x80 | (($arr[$k] >> 6) & 0x3f));
+            echo chr(0x80 | ($arr[$k] & 0x3f));
+            
+        } else {
+            
+            trigger_error(
+                'utf8_from_unicode: Codepoint out of Unicode range '.
+                    'at index: '.$k.', value: '.$arr[$k],
+                E_USER_WARNING
+                );
+            
+            // out of range
+            return FALSE;
+        }
+    }
+    
+    $result = ob_get_contents();
+    ob_end_clean();
+    return $result;
+}

Added: plog/trunk/class/data/utf8/utils/validation.php
===================================================================
--- plog/trunk/class/data/utf8/utils/validation.php	                        (rev 0)
+++ plog/trunk/class/data/utf8/utils/validation.php	2007-07-19 18:22:10 UTC (rev 5685)
@@ -0,0 +1,185 @@
+<?php
+/**
+* @version $Id: validation.php,v 1.2 2006/02/26 13:20:44 harryf Exp $
+* Tools for validing a UTF-8 string is well formed.
+* The Original Code is Mozilla Communicator client code.
+* The Initial Developer of the Original Code is
+* Netscape Communications Corporation.
+* Portions created by the Initial Developer are Copyright (C) 1998
+* the Initial Developer. All Rights Reserved.
+* Ported to PHP by Henri Sivonen (http://hsivonen.iki.fi)
+* Slight modifications to fit with phputf8 library by Harry Fuecks (hfuecks gmail com)
+* @see http://lxr.mozilla.org/seamonkey/source/intl/uconv/src/nsUTF8ToUnicode.cpp
+* @see http://lxr.mozilla.org/seamonkey/source/intl/uconv/src/nsUnicodeToUTF8.cpp
+* @see http://hsivonen.iki.fi/php-utf8/
+* @package utf8
+* @subpackage validation
+*/
+
+//--------------------------------------------------------------------
+/**
+* Tests a string as to whether it's valid UTF-8 and supported by the
+* Unicode standard
+* Note: this function has been modified to simple return true or false
+* @author <hsivonen at iki.fi>
+* @param string UTF-8 encoded string
+* @return boolean true if valid
+* @see http://hsivonen.iki.fi/php-utf8/
+* @see utf8_compliant
+* @package utf8
+* @subpackage validation
+*/
+function utf8_is_valid($str) {
+    
+    $mState = 0;     // cached expected number of octets after the current octet
+                     // until the beginning of the next UTF8 character sequence
+    $mUcs4  = 0;     // cached Unicode character
+    $mBytes = 1;     // cached expected number of octets in the current sequence
+    
+    $len = strlen($str);
+    
+    for($i = 0; $i < $len; $i++) {
+        
+        $in = ord($str{$i});
+        
+        if ( $mState == 0) {
+            
+            // When mState is zero we expect either a US-ASCII character or a
+            // multi-octet sequence.
+            if (0 == (0x80 & ($in))) {
+                // US-ASCII, pass straight through.
+                $mBytes = 1;
+                
+            } else if (0xC0 == (0xE0 & ($in))) {
+                // First octet of 2 octet sequence
+                $mUcs4 = ($in);
+                $mUcs4 = ($mUcs4 & 0x1F) << 6;
+                $mState = 1;
+                $mBytes = 2;
+                
+            } else if (0xE0 == (0xF0 & ($in))) {
+                // First octet of 3 octet sequence
+                $mUcs4 = ($in);
+                $mUcs4 = ($mUcs4 & 0x0F) << 12;
+                $mState = 2;
+                $mBytes = 3;
+                
+            } else if (0xF0 == (0xF8 & ($in))) {
+                // First octet of 4 octet sequence
+                $mUcs4 = ($in);
+                $mUcs4 = ($mUcs4 & 0x07) << 18;
+                $mState = 3;
+                $mBytes = 4;
+                
+            } else if (0xF8 == (0xFC & ($in))) {
+                /* First octet of 5 octet sequence.
+                *
+                * This is illegal because the encoded codepoint must be either
+                * (a) not the shortest form or
+                * (b) outside the Unicode range of 0-0x10FFFF.
+                * Rather than trying to resynchronize, we will carry on until the end
+                * of the sequence and let the later error handling code catch it.
+                */
+                $mUcs4 = ($in);
+                $mUcs4 = ($mUcs4 & 0x03) << 24;
+                $mState = 4;
+                $mBytes = 5;
+                
+            } else if (0xFC == (0xFE & ($in))) {
+                // First octet of 6 octet sequence, see comments for 5 octet sequence.
+                $mUcs4 = ($in);
+                $mUcs4 = ($mUcs4 & 1) << 30;
+                $mState = 5;
+                $mBytes = 6;
+                
+            } else {
+                /* Current octet is neither in the US-ASCII range nor a legal first
+                 * octet of a multi-octet sequence.
+                 */
+                return FALSE;
+                
+            }
+        
+        } else {
+            
+            // When mState is non-zero, we expect a continuation of the multi-octet
+            // sequence
+            if (0x80 == (0xC0 & ($in))) {
+                
+                // Legal continuation.
+                $shift = ($mState - 1) * 6;
+                $tmp = $in;
+                $tmp = ($tmp & 0x0000003F) << $shift;
+                $mUcs4 |= $tmp;
+            
+                /**
+                * End of the multi-octet sequence. mUcs4 now contains the final
+                * Unicode codepoint to be output
+                */
+                if (0 == --$mState) {
+                    
+                    /*
+                    * Check for illegal sequences and codepoints.
+                    */
+                    // From Unicode 3.1, non-shortest form is illegal
+                    if (((2 == $mBytes) && ($mUcs4 < 0x0080)) ||
+                        ((3 == $mBytes) && ($mUcs4 < 0x0800)) ||
+                        ((4 == $mBytes) && ($mUcs4 < 0x10000)) ||
+                        (4 < $mBytes) ||
+                        // From Unicode 3.2, surrogate characters are illegal
+                        (($mUcs4 & 0xFFFFF800) == 0xD800) ||
+                        // Codepoints outside the Unicode range are illegal
+                        ($mUcs4 > 0x10FFFF)) {
+                        
+                        return FALSE;
+                        
+                    }
+                    
+                    //initialize UTF8 cache
+                    $mState = 0;
+                    $mUcs4  = 0;
+                    $mBytes = 1;
+                }
+            
+            } else {
+                /**
+                *((0xC0 & (*in) != 0x80) && (mState != 0))
+                * Incomplete multi-octet sequence.
+                */
+                
+                return FALSE;
+            }
+        }
+    }
+    return TRUE;
+}
+
+//--------------------------------------------------------------------
+/**
+* Tests whether a string complies as UTF-8. This will be much
+* faster than utf8_is_valid but will pass five and six octet
+* UTF-8 sequences, which are not supported by Unicode and
+* so cannot be displayed correctly in a browser. In other words
+* it is not as strict as utf8_is_valid but it's faster. If you use
+* is to validate user input, you place yourself at the risk that
+* attackers will be able to inject 5 and 6 byte sequences (which
+* may or may not be a significant risk, depending on what you are
+* are doing)
+* @see utf8_is_valid
+* @see http://www.php.net/manual/en/reference.pcre.pattern.modifiers.php#54805
+* @param string UTF-8 string to check
+* @return boolean TRUE if string is valid UTF-8
+* @package utf8
+* @subpackage validation
+*/
+function utf8_compliant($str) {
+    if ( strlen($str) == 0 ) {
+        return TRUE;
+    }
+    // If even just the first character can be matched, when the /u
+    // modifier is used, then it's valid UTF-8. If the UTF-8 is somehow
+    // invalid, nothing at all will match, even if the string contains
+    // some valid sequences
+    return (preg_match('/^.{1}/us',$str,$ar) == 1);
+}
+



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