38 lines
833 B
PHP
38 lines
833 B
PHP
<?php
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/**
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* @package utf8
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*/
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//---------------------------------------------------------------
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/**
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* UTF-8 aware alternative to strcspn
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* Find length of initial segment not 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/strcspn
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* @see utf8_strlen
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* @package utf8
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*/
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function utf8_strcspn($str, $mask, $start = null, $length = null)
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{
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if (empty($mask) || strlen($mask) == 0) {
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return null;
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}
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$mask = preg_replace('!([\\\\\\-\\]\\[/^])!', '\\\${1}', $mask);
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if ($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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