#48047 [Opn->Bgs]: preg_replace returns NULL over string size

ID: 48047 Updated by: scottmac@php.net Reported By: goriol at technema dot fr -Status: Open +Status: Bogus Bug Type: *Regular Expressions Operating System: Windows XP PHP Version: 5.2.9 New Comment: preg_last_error() returns 2 which is PREG_BACKTRACK_LIMIT_ERROR. Previous Comments: ------------------------------------------------------------------------ [2009-04-22 13:53:16] goriol at technema dot fr Description: ------------ I found a situation where preg_replace returns NULL instead of the expected string. The regexp I use is (perhaps) erroneous: "/^\s*(.*?)\s*$/s" But when the string size is less than 49997 characters, the function returns the string properly. Over that size, the function returns NULL. Reproduce code: --------------- $a = str_repeat('a', 49998); $a = preg_replace('/^\s*(.*?)\s*$/s', '$1', $a); Expected result: ---------------- $a Actual result: -------------- NULL ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=48047&edit=1