Edit report at http://bugs.php.net/bug.php?id=53825&edit=1
ID: 53825 Updated by: fel...@php.net Reported by: mikhail dot v dot gavrilov at gmail dot com Summary: incorrect result preg_replace with large strings -Status: Open +Status: Bogus Type: Bug Package: Scripting Engine problem Operating System: Ubuntu 10.10 PHP Version: 5.3.5 Block user comment: N Private report: N New Comment: Thank you for taking the time to write to us, but this is not a bug. Please double-check the documentation available at http://www.php.net/manual/ and the instructions on how to report a bug at http://bugs.php.net/how-to-report.php Check out what preg_last_error() has returned to figure out why PCRE lib has failed. You need to increase the pcre.backtrack_limit value. e.g. ini_set('pcre.backtrack_limit', PHP_INT_MAX); - http://docs.php.net/manual/en/pcre.configuration.php - http://docs.php.net/manual/en/function.preg-last-error.php Previous Comments: ------------------------------------------------------------------------ [2011-01-23 21:28:19] mikhail dot v dot gavrilov at gmail dot com Description: ------------ While converting phpBB code to html, preg_replace return empty string. Test case: <?php $str = '[b]'; // Please try run this test case also with $i<99997 and compare result's for ($i=0; $i<99998; $i++) $str .= 'q'; $str = preg_replace("#\[b\](.+?)\[\/b\]#is", "[p]", $str); echo $str; ?> I know about pcre.backtrack_limit, but i think in this case PCRE must generate exception with fatal error. Test script: --------------- <?php $str = '[b]'; // Please try run this test case also with $i<99997 and compare result's for ($i=0; $i<99998; $i++) $str .= 'q'; $str = preg_replace("#\[b\](.+?)\[\/b\]#is", "[p]", $str); echo $str; ?> Expected result: ---------------- Return non empty string or generate exception with fatal error Actual result: -------------- Empty string ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/bug.php?id=53825&edit=1
