#46664 [Com]: preg_match returns false negative on > 100 kB strings for some patterns

ID: 46664 Comment by: patrik dot hirvinen at nemein dot com Reported By: patrik dot hirvinen at nemein dot com Status: Open Bug Type: *Regular Expressions Operating System: Mac OS X 10.5 PHP Version: 5.2.6 New Comment: Also on at least on linux(debian) with PHP 5.2.0-8+etch11 Previous Comments: ------------------------------------------------------------------------ [2008-11-25 12:08:50] patrik dot hirvinen at nemein dot com Description: ------------ preg_match fails for some patterns when the searched string exceeds around 100300 bytes. It matches for same strings if enough text is removed from the middle part which gets captured by the pattern when working correctly. Also the exact same regexp works fine for perl on unshortened output. Reproduce code: --------------- <?php //foo.html >= 100 kB $contents = file_get_contents("foo.html"); $matches = array(); preg_match('%<BODY\s*>.*?</H[1-6]>(.+?)</BODY>%si', $contents, $matches); //$matches is empty var_dump($matches); ?> Expected result: ---------------- array(1) { [0]=> string(12935) "/*lots of html*/ } Actual result: -------------- array(0) { } ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=46664&edit=1