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.
Konfiguracja wykonawcza
Na działanie tych funkcji wpływają ustawienia zawarte w pliku php.ini.
| Nazwa | Domyślnie | Możliwość zmian | Rejestr zmian |
|---|---|---|---|
| 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. |
| pcre.jit | "1" | PHP_INI_ALL | Available since PHP 7.0.0. |
Oto krótkie wyjaśnienie dyrektyw konfiguracji.
-
pcre.backtrack_limitinteger -
PCRE's backtracking limit. Defaults to 100000 for PHP < 5.3.7.
-
pcre.recursion_limitinteger -
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).
-
pcre.jitboolean -
Whether PCRE's just-in-time compilation is going to be used.
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User Contributed Notes 2 notes
chris at ocproducts dot com ¶
13 years ago
610010559 at qq dot com ¶
4 years ago
pcre.backtrack_limit can be set to -1;
ini_set("pcre.backtrack_limit", "-1");
after i put the above code in my code, it works;
so i guess -1 means infinite(i am not very sure ,but it works);
so when you have not idea how much it should be set in your program, you can try this.
