preg_match Perform a regular expression match intpreg_match stringpattern stringsubject arraymatches Searches subject for a match to the regular expression given in pattern. If matches is provided, then it is filled with the results of search. $matches[0] will contain the text that matched the full pattern, $matches[1] will have the text that matched the first captured parenthesized subpattern, and so on. Returns &true; if a match for pattern was found in the subject string, or &false; if not match was found or an error occurred. This example will produce: See also preg_match_all, preg_replace, and preg_split.