설치
pcre.backtrack_limit defaults to 100k. This is rather conservative.
It is limited by RAM size, not the ulimit on stack-size.
On a (2009-era) netbook, I can set pcre.backtrack_limit to 100 million, and the regex will happily process a 90 million character string in about 3 seconds. YMMV.
실행시 설정
이 함수의 작동은 php.ini 설정에 영향을 받습니다.
| Name | Default | Changeable | Changelog |
|---|---|---|---|
| pcre.backtrack_limit | "1000000" | PHP_INI_ALL | Available since PHP 5.2.0. |
| pcre.recursion_limit | "100000" | PHP_INI_ALL | Available since PHP 5.2.0. |
위 설정 지시어에 대한 간단한 설명입니다.
- pcre.backtrack_limit integer
-
PCRE's backtracking limit. Defaults to 100000 for PHP < 5.3.7.
- pcre.recursion_limit integer
-
PCRE's recursion limit. Please note that if you set this value to a high number you may consume all the available process stack and eventually crash PHP (due to reaching the stack size limit imposed by the Operating System).
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User Contributed Notes
실행시 설정
php at richardneill dot org
14-Jan-2011 09:55
chris at ocproducts dot com
02-Jul-2010 07:42
pcre.backtrack_limit sets the maximum bind length PREG calls (e.g. preg_replace_callback) can make. However the actual maximum seems to be approximately half the value set here, possibly due to the character encoding that PCRE runs with internally.