PHP：“<<”和“>>”之间的preg_replace

Hi I want to replace the content between "<<" and ">>" with custom div class how can I do that?

I tried some regex but It didn't work.

$con = preg_replace ('/<<(.*?)>>/s', '<div>$1</div>', $con);

I would propose putting the < and > in character classes:

preg_replace('/[<]{2}(.*?)[>]{2}/s', '<div>$1</div>', $con);

Escaping them should also work

preg_replace('/\<\<(.*?)\>\>/s', '<div>$1</div>', $con);

But CC001's comment above is correct: Neither one of these is needed.