Bug #77923 [Com]: preg_* function cannot get correct result

Edit report at https://bugs.php.net/bug.php?id=77923&edit=1 ID: 77923 Comment by: 2317216477 at qq dot com Reported by: 2317216477 at qq dot com Summary: preg_* function cannot get correct result Status: Not a bug Type: Bug Package: PCRE related Operating System: any PHP Version: 7.2.18RC1 Block user comment: N Private report: N New Comment: I checked https://www.php.net/manual/zh/pcre.constants.php and I found Robert（a user added a note）said the same problem, I think it's still a problem for php7.0 to 7.2, for example, this is my regular func: preg_f() and this is my pseudo code: preg_f() error = preg_last_error() if(error){ preg_f() } Only if I re-match can I get the correct result, I think it is not reasonable because the logic:"I don't know I will be right or not until I checked preg_last_error()", that is ... I don't know, maybe stupid. Maybe php7.0 to 7.2 should handle it itself, or just throw a fatal error so a user know the expression is correct or not in a certain way directly! In a word, it returns a different result with php5 or php7.3+, it makes me puzzled Previous Comments: ------------------------------------------------------------------------ [2019-04-20 05:52:07] requinix@php.net Your regular expression is too inefficient to be used with JIT mode on such a large input. PCRE (not PHP) is aborting executing because it ran out of stack space - preg_last_error() = PREG_JIT_STACKLIMIT_ERROR (6). Disabling JIT for that regex is a workaround. Fixing the regex is better. But personally I would consider using SimpleXML to find the <w:p> elements, scan for your ${var} or ${/var} tokens, then... I don't know what you want to do from there. ------------------------------------------------------------------------ [2019-04-19 11:33:48] 2317216477 at qq dot com You can use "ini_set" and set "pcre.jit" to 0 before preg_* functions to fix the problem I don't know why it happens and hope someone can fix it basically ------------------------------------------------------------------------ [2019-04-19 11:23:20] 2317216477 at qq dot com Description: ------------ preg_* function cannot get correct result in php7.0~7.2 sometimes the test string is too long so I put a test script on my github page(https://github.com/icy2003/php/blob/master/samples/php7preg_bug.php) you can test this script on this website:https://3v4l.org/,or you can install php 7.0~7.2 in local environment Test script: --------------- https://github.com/icy2003/php/blob/master/samples/php7preg_bug.php Expected result: ---------------- my pattern expected some results but in php7.0~7.2 it will be empty array!! you can use "ini_set" and set "pcre.jit" to 0 before preg_* functions to fix the problem ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=77923&edit=1