如何在php中将文本preg_replace到强标记

Question

I wanted to replace

<strong>abc</strong>

to this

<strong>abc</strong>

PHP

preg_replace('/(&lt;strong&gt;(.*?)&lt;/strong&gt;)/', '<strong>\\2</strong>', $input)

Give an error

Warning: preg_replace(): Unknown modifier 't' in D:\xampp\htdocs\myquestion\p\method.php on line 94

I'm newbie about regex please help. Many thanks.

Answer 1

You need to escape the front-slash in your pattern.

 preg_replace('/&lt;strong&gt;(.*)&lt;\/strong&gt;/', '<strong>$1</strong>', $input);