vendor/phputf8/strcspn.php

   1 <?php
   2 /**
   3 * @version $Id: strcspn.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 strcspn
  11 * Find length of initial segment not 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/strcspn
  16 * @see utf8_strlen
  17 * @package utf8
  18 * @subpackage strings
  19 */
  20 function utf8_strcspn($str, $mask, $start = NULL, $length = NULL) {
  21
  22     if ( empty($mask) || strlen($mask) == 0 ) {
  23         return NULL;
  24     }
  25
  26     $mask = preg_replace('!([\\\\\\-\\]\\[/^])!','\\\${1}',$mask);
  27
  28     if ( $start !== NULL || $length !== NULL ) {
  29         $str = utf8_substr($str, $start, $length);
  30     }
  31
  32     preg_match('/^[^'.$mask.']+/u',$str, $matches);
  33
  34     if ( isset($matches[0]) ) {
  35         return utf8_strlen($matches[0]);
  36     }
  37
  38     return 0;
  39
  40 }
  41