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   1  <?php
   2  /**
   3  * @package utf8
   4  */
   5  
   6  //---------------------------------------------------------------
   7  /**
   8  * UTF-8 aware replacement for ltrim()
   9  * Note: you only need to use this if you are supplying the charlist
  10  * optional arg and it contains UTF-8 characters. Otherwise ltrim will
  11  * work normally on a UTF-8 string
  12  * @author Andreas Gohr <[email protected]>
  13  * @see http://www.php.net/ltrim
  14  * @see http://dev.splitbrain.org/view/darcs/dokuwiki/inc/utf8.php
  15  * @return string
  16  * @package utf8
  17  */
  18  function utf8_ltrim( $str, $charlist = FALSE ) {
  19      if($charlist === FALSE) return ltrim($str);
  20  
  21      //quote charlist for use in a characterclass
  22      $charlist = preg_replace('!([\\\\\\-\\]\\[/^])!','\\\$1}',$charlist);
  23  
  24      return preg_replace('/^['.$charlist.']+/u','',$str);
  25  }
  26  
  27  //---------------------------------------------------------------
  28  /**
  29  * UTF-8 aware replacement for rtrim()
  30  * Note: you only need to use this if you are supplying the charlist
  31  * optional arg and it contains UTF-8 characters. Otherwise rtrim will
  32  * work normally on a UTF-8 string
  33  * @author Andreas Gohr <[email protected]>
  34  * @see http://www.php.net/rtrim
  35  * @see http://dev.splitbrain.org/view/darcs/dokuwiki/inc/utf8.php
  36  * @return string
  37  * @package utf8
  38  */
  39  function utf8_rtrim( $str, $charlist = FALSE ) {
  40      if($charlist === FALSE) return rtrim($str);
  41  
  42      //quote charlist for use in a characterclass
  43      $charlist = preg_replace('!([\\\\\\-\\]\\[/^])!','\\\$1}',$charlist);
  44  
  45      return preg_replace('/['.$charlist.']+$/u','',$str);
  46  }
  47  
  48  //---------------------------------------------------------------
  49  /**
  50  * UTF-8 aware replacement for trim()
  51  * Note: you only need to use this if you are supplying the charlist
  52  * optional arg and it contains UTF-8 characters. Otherwise trim will
  53  * work normally on a UTF-8 string
  54  * @author Andreas Gohr <[email protected]>
  55  * @see http://www.php.net/trim
  56  * @see http://dev.splitbrain.org/view/darcs/dokuwiki/inc/utf8.php
  57  * @return string
  58  * @package utf8
  59  */
  60  function utf8_trim( $str, $charlist = FALSE ) {
  61      if($charlist === FALSE) return trim($str);
  62      return utf8_ltrim(utf8_rtrim($str, $charlist), $charlist);
  63  }