#48416 [Opn->Fbk]: Memleak in ereg() and eregi() functions

ID: 48416 Updated by: scottmac@php.net Reported By: bmorel at ssi dot fr -Status: Open +Status: Feedback Bug Type: Regexps related Operating System: CentOS 5.3 PHP Version: 5.2.9 New Comment: Please try using this CVS snapshot: http://snaps.php.net/php5.3-latest.tar.gz For Windows: http://windows.php.net/snapshots/ Pretty sure this is due to the regular expression cache we have, each unique regular expression is cached so we don't keep compiling it but there is no cap on the number we store. Can you try a 5.3 snapshot, I think we switched from using ereg to pcre with 5.3. Previous Comments: ------------------------------------------------------------------------ [2009-05-28 16:57:59] bmorel at ssi dot fr Description: ------------ When repeating an ereg() or eregi() on different patterns, the memory usage of httpd (or php if executed from the command-line) gets huge (about 1GB for the example below) for the time the script executes, then the memory is freed. During this time, the memory_get_usage() stays normal, and php's memory limit doesn't trigger. When repeating the ereg() with the same pattern each time, the memory usage stays normal; this happens only when repeating with a different pattern each time. Verified on CentOS with PHP 5.2.6 & 5.2.9 Verified on Windows XP with PHP 5.2.8 Reproduce code: --------------- <?php for ($i=0;$i<1000000;$i++) ereg("$i","test"); ?> Expected result: ---------------- Memory usage staying low. Actual result: -------------- Memory usage as shown by "top -d 1" gets huge. ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=48416&edit=1