42 lines
923 B
PHP
42 lines
923 B
PHP
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<?php
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/**
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* @version $Id$
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* @package utf8
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* @subpackage strings
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*/
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//---------------------------------------------------------------
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/**
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* UTF-8 aware alternative to strspn
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* Find length of initial segment matching mask
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* Note: requires utf8_strlen and utf8_substr (if start, length are used)
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* @param string
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* @return int
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* @see http://www.php.net/strspn
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* @package utf8
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* @subpackage strings
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*/
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function utf8_strspn($str, $mask, $start = NULL, $length = NULL) {
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$mask = preg_replace('!([\\\\\\-\\]\\[/^])!','\\\${1}',$mask);
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// Fix for $start but no $length argument.
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if ($start !== null && $length === null) {
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$length = utf8_strlen($str);
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}
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if ( $start !== NULL || $length !== NULL ) {
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$str = utf8_substr($str, $start, $length);
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}
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preg_match('/^['.$mask.']+/u',$str, $matches);
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if ( isset($matches[0]) ) {
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return utf8_strlen($matches[0]);
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}
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return 0;
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}
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