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