How to implement regular expression matching in php to replace a string

php method to implement regular expression matching for a string replacement: 1. Create a PHP sample file; 2. Use "preg_replace('/&topic=(.*?)&type=/',"&topic= {$data['topic']}&...)" can be replaced.

The operating environment of this article: Windows 7 system, PHP version 7.4 , DELL G3 computer

How to use php to match a regular expression to replace a string?

PHP regular expression to replace part of the content

preg_replace('/&topic=(.*?)&type=/',"&topic={$data['topic']}&type=",$postFields);

Main It is the

red part in the first parameter, one at the beginning and one at the end and any string in the middle; /&topic=(.*?)&type=/

The second one The parameter is what to replace it with

The third parameter is which variable to get the value from;

Students who don’t know how can take it directly;

Recommended study: "PHP video tutorial》

The above is the detailed content of How to implement regular expression matching in php to replace a string. For more information, please follow other related articles on the PHP Chinese website!