Preg_match regular matching string length problem analysis

ini_set(‘pcre.backtrack_limit’, 999999999);

Note: This parameter is available after PHP 5.2.0 version.

About: pcre.recursion_limit pcre.recursion_limit is the recursion limit of pcre. If this item is set to a large value, the available stacks of all processes will be consumed, and eventually PHP will crash. You can also limit it by modifying the configuration:

ini_set('pcre.recursion_limit', 99999);

It is best to limit the memory:

ini_set(' memory_limit', '64m'); .