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[scuttle] / includes / utf8 / 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

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