#48047 [NEW]: preg_replace returns NULL over string size

From: goriol at technema dot fr Operating system: Windows XP PHP version: 5.2.9 PHP Bug Type: *Regular Expressions Bug description: preg_replace returns NULL over string size 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 bug report at http://bugs.php.net/?id=48047&edit=1 -- Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=48047&r=trysnapshot52 Try a CVS snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=48047&r=trysnapshot53 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=48047&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=48047&r=fixedcvs Fixed in CVS and need be documented: http://bugs.php.net/fix.php?id=48047&r=needdocs Fixed in release: http://bugs.php.net/fix.php?id=48047&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=48047&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=48047&r=needscript Try newer version: http://bugs.php.net/fix.php?id=48047&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=48047&r=support Expected behavior: http://bugs.php.net/fix.php?id=48047&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=48047&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=48047&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=48047&r=globals PHP 4 support discontinued: http://bugs.php.net/fix.php?id=48047&r=php4 Daylight Savings: http://bugs.php.net/fix.php?id=48047&r=dst IIS Stability: http://bugs.php.net/fix.php?id=48047&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=48047&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=48047&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=48047&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=48047&r=mysqlcfg