preg_match regular matching prompt pcre.backtrack_limit solution_PHP tutorial

This article introduces the solution to the preg_match regular matching prompt pcre.backtrack_limit. Friends in need can refer to it.

Using preg_match to extract the target content, there is a problem with life and death, and the code is dead or alive.

Later I suspected that PHP's preg_match had a string length limit. Sure enough, I found that the value of "pcre.backtrack_limit" was only set to 100000 by default.

Solution:

代码如下	复制代码
ini_set('pcre.backtrack_limit', 999999999);

Note: This parameter is available after PHP 5.2.0 version.

Also, let’s talk 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: In actual project applications, it is best to limit the memory: ini_set('memory_limit', '64M'); , which is more secure.

The code is as follows

代码如下	复制代码
ini_set('pcre.recursion_limit', 99999);

Copy code

ini_set('pcre.recursion_limit' , 99999);

代码如下	复制代码
pcre.backtrack_limit=-1

References for other solutions

The code is as follows

Copy code

pcre.backtrack_limit=-1 For more details, please check: http://www.bKjia.c0m/phper/31/42927.htm http://www.bkjia.com/PHPjc/632177.html www.bkjia.comtruehttp: //www.bkjia.com/PHPjc/632177.htmlTechArticleThis article introduces the solution to the preg_match regular matching prompt pcre.backtrack_limit. Friends in need can refer to it. Use preg_match to extract the target content. If there is a problem, please replace...