compat.php

   1 <?php
   2
   3 if (!function_exists('mb_strlen'))
   4 {
   5   // from Typo3
   6   // author Martin Kutschker <martin.t.kutschker@blackbox.net>
   7   function mb_strlen($str, $encoding="utf-8")
   8     {
   9       if($encoding != "utf-8")
  10         { return -1; }
  11
  12       $n=0;
  13
  14       for($i=0; isset($str{$i}); $i++)
  15         {
  16           $c = ord($str{$i});
  17
  18           if (!($c & 0x80)) // single-byte (0xxxxxx)
  19             $n++;
  20
  21           elseif (($c & 0xC0) == 0xC0) // multi-byte starting byte (11xxxxxx)
  22             $n++;
  23         }
  24
  25       return $n;
  26     }
  27 }
  28
  29 if (!function_exists('mb_substr'))
  30 {
  31   // from Typo3
  32   // author Martin Kutschker <martin.t.kutschker@blackbox.net>
  33   function mb_substr($str, $start, $len=null, $encoding="utf-8")
  34     {
  35       if($encoding != "utf-8")
  36         { return -1; }
  37
  38       $byte_start = utf8_char2byte_pos($str,$start);
  39
  40       if ($byte_start === false)
  41         return false; // $start outside string length
  42
  43       $str = substr($str,$byte_start);
  44
  45       if ($len != null)
  46         {
  47           $byte_end = utf8_char2byte_pos($str,$len);
  48
  49           if ($byte_end === false) // $len outside actual string length
  50             return $str;
  51           else
  52             return substr($str,0,$byte_end);
  53         }
  54
  55       else return $str;
  56     }
  57
  58   function utf8_char2byte_pos($str,$pos)
  59     {
  60       $n = 0;  // number of characters found
  61       $p = abs($pos); // number of characters wanted
  62
  63       if ($pos >= 0)
  64         {
  65           $i = 0;
  66           $d = 1;
  67         } else {
  68           $i = strlen($str)-1;
  69           $d = -1;
  70         }
  71
  72       for( ; isset($str{$i}) && $n<$p; $i+=$d)
  73         {
  74           $c = (int)ord($str{$i});
  75
  76           if (!($c & 0x80)) // single-byte (0xxxxxx)
  77             $n++;
  78           elseif (($c & 0xC0) == 0xC0) // multi-byte starting byte (11xxxxxx)
  79             $n++;
  80         }
  81
  82       if (!isset($str{$i}))
  83         return false; // offset beyond string length
  84
  85       if ($pos >= 0)
  86         {
  87           // skip trailing multi-byte data bytes
  88           while ((ord($str{$i}) & 0x80) && !(ord($str{$i}) & 0x40))
  89             { $i++; }
  90         } else {
  91           // correct offset
  92           $i++;
  93         }
  94
  95       return $i;
  96          }
  97
  98         if (!function_exists('mb_strtolower')) {
  99           function mb_strtolower($msg, $encoding) {
 100                   return $msg;
 101                 }
 102         }
 103 }