#33468 [Opn->Asn]: preg_match on long strings fails

ID: 33468 Updated by: tony2001@php.net Reported By: mjsherman at chartermi dot net -Status: Open +Status: Assigned Bug Type: PCRE related Operating System: Linux PHP Version: 4.3.11 -Assigned To: +Assigned To: andrei New Comment: Andrei, could you check it plz. As far as I understand, this is something not related to PHP, but just another PCRE limitation. Previous Comments: ------------------------------------------------------------------------ [2005-06-24 19:21:22] mjsherman at chartermi dot net Just tested with 5.1.0beta2 Same problem. ------------------------------------------------------------------------ [2005-06-24 18:28:01] tony2001@php.net Please try using this CVS snapshot: http://snaps.php.net/php5-latest.tar.gz For Windows: http://snaps.php.net/win32/php5-win32-latest.zip ------------------------------------------------------------------------ [2005-06-24 18:24:34] mjsherman at chartermi dot net Description: ------------ preg_match, if passed a long subject string, fails unexpectedly. I have read through the PCRE limitations, and can't see that this is one of them. I have tried increasing memory limit (to increase the stack) with the same results. Cutoff and examples are below: Reproduce code: --------------- $subject = str_repeat('a',100); $subject .= str_repeat('b', 4370); $subject .= str_repeat('a', 100); if (preg_match('/(.*).*?\1/',$subject)) { echo "OK\n"; } Expected result: ---------------- "OK" to be printed after matching 100 "a"s. If 4370 is changed to 4369, then "OK" is printed. Actual result: -------------- With 4370 'b's, nothing is printed (failed preg_match) With 4369 'b's, "OK" is printed (worked). ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=33468&edit=1