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<?php $str = 'November 1997'; $str2 = 'November 20, 2001'; $matches; preg_match('/\d{4}/', $str,$matches); var_dump( (int) $str, intval($str), filter_var($str, FILTER_SANITIZE_NUMBER_INT), $matches );
Output for git.master, git.master_jit, rfc.property-hooks
int(0) int(0) string(4) "1997" array(1) { [0]=> string(4) "1997" }

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