in PHP, how to remove specific class from html tag?

Question

given the following string in PHP:

$html = \"

text 1


        
      

Answer 1

You can use any DOM Parser, iterate over every element. Check whether its class attribute contains test2 class (strpos()) if so then set empty string as a value for class attribute.

You can also use regular expressions to do that - much shorter way. Just find and replace (preg_replace()) using the following expression: #class=".*?test2.*?"#is