preg_replace正则表达式标记未被替换

Question

Hoping you can help. Pretty new to regex and although I have written this regex it doesnt seem to match. I dont recieve an error message so im assuming the syntax is correct but its just not being applied?

I want the regex to replace content like

{foo}bar{/foo} with bar

Here is my code:

$regex = "#([{].*?[}])(.*?)([{]/.*?[}])#e";
$return = preg_replace($regex,"('$2')",$return);

Hope someone can help. Not sure why it doesnt seem to work.

Thanks for reading.

Answer 1

Your regex does work, however it isn't smart enough to know that the end tag has to be the same as the start tag. I would use this instead. I've also simplified it a little:

$regex = '#{([^}]*)}(.*?)\{/\\1}#';

echo preg_replace('{foo}bar{/foo}', '$2', $str); // outputs "bar"

Codepad