vendor/phputf8/strspn.php

   1 <?php
   2 /**
   3 * @version $Id: strspn.php,v 1.1 2006/02/25 13:50:17 harryf Exp $
   4 * @package utf8
   5 * @subpackage strings
   6 */
   7
   8 //---------------------------------------------------------------
   9 /**
  10 * UTF-8 aware alternative to strspn
  11 * Find length of initial segment matching mask
  12 * Note: requires utf8_strlen and utf8_substr (if start, length are used)
  13 * @param string
  14 * @return int
  15 * @see http://www.php.net/strspn
  16 * @package utf8
  17 * @subpackage strings
  18 */
  19 function utf8_strspn($str, $mask, $start = NULL, $length = NULL) {
  20
  21     $mask = preg_replace('!([\\\\\\-\\]\\[/^])!','\\\${1}',$mask);
  22
  23     if ( $start !== NULL || $length !== NULL ) {
  24         $str = utf8_substr($str, $start, $length);
  25     }
  26
  27     preg_match('/^['.$mask.']+/u',$str, $matches);
  28
  29     if ( isset($matches[0]) ) {
  30         return utf8_strlen($matches[0]);
  31     }
  32
  33     return 0;
  34
  35 }
  36