#49333 [Opn->Fbk]: Bug in recursive regex processing

ID: 49333 Updated by: jani@php.net Reported By: inf3rno dot hu at gmail dot com -Status: Open +Status: Feedback Bug Type: PCRE related Operating System: Windows XP PHP Version: 5.2.10 New Comment: I can not reproduce this either. Can you provide the test script as downloadable package somewhere? Previous Comments: ------------------------------------------------------------------------ [2009-08-24 12:21:40] inf3rno dot hu at gmail dot com I reproduced it on another computer with the latest WAMPServer (Apache 2.2.11, PHP 5.3.0). I copied the code from here. ------------------------------------------------------------------------ [2009-08-24 11:54:12] inf3rno dot hu at gmail dot com Apache and Php reinstall didn't help. :S ------------------------------------------------------------------------ [2009-08-24 11:20:39] inf3rno dot hu at gmail dot com Yes, I can reproduce it. Tried with alternative text editor, but same result. So I think it's not memory or text editor problem. (Btw. I'll test my computer's memory soon.) I'll try it out after a reinstall, maybe some dll files are damaged. ------------------------------------------------------------------------ [2009-08-23 10:54:45] sjoerd@php.net Could not reproduce. When I run the code example you supplied, I get the expected result. Are you sure you have submitted the right code example? ------------------------------------------------------------------------ [2009-08-23 08:10:45] inf3rno dot hu at gmail dot com Description: ------------ I developed a recursive regex pattern for compile template patterns. During the tests I found this bug. I managed to restrict it to the following piece of code. The count of the numbers, and every character (\n too) counts. So if I have 11+ characters long string in the 'y'-s block, then it's buggy, but by 10- character long strings it works fine. I hope it's a real bug, and not a damage in my computer. :-) Reproduce code: --------------- $pattern='%.*?(?:([a-z])(?:.*?(?:(?R).*?)*?\1)?|$)%sD'; $test=' x 0123456789 x y 01234567890 y'; preg_match_all($pattern,$test,$matches,PREG_SET_ORDER); var_dump($matches); Expected result: ---------------- array(3) { [0]=> array(2) { [0]=> string(18) " x 0123456789 x" [1]=> string(1) "x" } [1]=> array(2) { [0]=> string(19) " y 01234567890 y" [1]=> string(1) "y" } [2]=> array(1) { [0]=> string(0) "" } } Actual result: -------------- array(0) { } ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=49333&edit=1