Bug #79237 [Fbk->Asn]: filter_var limited to 8192 characters in input string

Edit report at https://bugs.php.net/bug.php?id=79237&edit=1 ID: 79237 User updated by: murray at focus-computing dot com dot au Reported by: murray at focus-computing dot com dot au Summary: filter_var limited to 8192 characters in input string -Status: Feedback +Status: Assigned Type: Bug Package: *Regular Expressions Operating System: Debian 4.19.67-2+deb10u1 (2019-0 PHP Version: 7.3Git-2020-02-07 (Git) Assigned To: cmb Block user comment: N Private report: N New Comment: I tried pcre.jit=0 and this worked. I'm not sure what that changes, or why it worked. I'm happy, but perhaps we should add a comment to the online manual? Previous Comments: ------------------------------------------------------------------------ [2020-02-07 08:03:54] cmb@php.net Please try again with pcre.jit=0 (unless you did already). With pcre.jit=1, I get PCRE2_ERROR_JIT_STACKLIMIT[1] internally. [1] <https://www.pcre.org/current/doc/html/pcre2api.html#SEC31> ------------------------------------------------------------------------ [2020-02-07 03:29:54] murray at focus-computing dot com dot au Description: ------------ I was testing some input being passed via a parameter to my script. I was getting an error indicating that the value passed was invalid, yet it didn't contain any of the strings I was searching for. I went through the process of shortening the string and when I got below 8192 chars in length it worked, over 8192 chars in length it would fail. I also tried this on PHP v7.1.32 and the exact same code on my Mac OSX which worked correctly. Test script: --------------- filter_var(trim($_REQUEST['parms']), FILTER_VALIDATE_REGEXP, array("options" => array("regexp" => "/^((?!union select|union all|\'A=|select char).)*$/im"))); Expected result: ---------------- A) filter_var should handle strings longer than 8192 chars OR B) Add documentation to filter_var manual entry indicating maximum length of string. ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=79237&edit=1