PHP regex to replace content between { }

Question

I have the following regex to replace everything between [[ and ]] with a callback function. Somehow I don\'t know how to change it to replace the text

Answer 1

Posting an answer that should work with nested brackets also:

$str = 'this is the text that {i want{to} replace this text} from it';
echo preg_replace('/ \{ ( (?: [^{}]* | (?0) )+ ) \} /x', 'REPLACE TEXT', $str);
//=> this is the text that REPLACE TEXT from it

This regex is using conditional subpattern regex.