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   1  <?php
   2  /**
   3  * @package utf8
   4  */
   5  
   6  //---------------------------------------------------------------
   7  /**
   8  * UTF-8 aware alternative to ucwords
   9  * Uppercase the first character of each word in a string
  10  * Note: requires utf8_substr_replace and utf8_strtoupper
  11  * @param string
  12  * @return string with first char of each word uppercase
  13  * @see http://www.php.net/ucwords
  14  * @package utf8
  15  */
  16  function utf8_ucwords($str) {
  17      // Note: [\x0c\x09\x0b\x0a\x0d\x20] matches;
  18      // form feeds, horizontal tabs, vertical tabs, linefeeds and carriage returns
  19      // This corresponds to the definition of a "word" defined at http://www.php.net/ucwords
  20      $pattern = '/(^|([\x0c\x09\x0b\x0a\x0d\x20]+))([^\x0c\x09\x0b\x0a\x0d\x20]{1})[^\x0c\x09\x0b\x0a\x0d\x20]*/u';
  21      return preg_replace_callback($pattern, 'utf8_ucwords_callback',$str);
  22  }
  23  
  24  //---------------------------------------------------------------
  25  /**
  26  * Callback function for preg_replace_callback call in utf8_ucwords
  27  * You don't need to call this yourself
  28  * @param array of matches corresponding to a single word
  29  * @return string with first char of the word in uppercase
  30  * @see utf8_ucwords
  31  * @see utf8_strtoupper
  32  * @package utf8
  33  */
  34  function utf8_ucwords_callback($matches) {
  35      $leadingws = $matches[2];
  36      $ucfirst = utf8_strtoupper($matches[3]);
  37      $ucword = utf8_substr_replace(ltrim($matches[0]),$ucfirst,0,1);
  38      return $leadingws . $ucword;
  39  }
  40