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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》
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