运行时配置

这些函数的行为受 php.ini 中的设置影响。

PCRE Configuration Options

Name	Default	Changeable	Changelog
pcre.backtrack_limit	"100000"	PHP_INI_ALL	Available since PHP 5.2.0.
pcre.recursion_limit	"100000"	PHP_INI_ALL	Available since PHP 5.2.0.

有关 PHP_INI_* 样式的更多详情与定义，见 Where a configuration setting may be set。

这是配置指令的简短说明。

pcre.backtrack_limit integer

PCRE's backtracking limit.

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).