3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $c = json_encode(["foo"=>["password"=>"foo\\\"\"bar"]]); echo preg_replace('{("password"\s*:\s*)"(?:[^"\\\\]|(?:\\\\.))*"}', '$1"****"', $c);
based on EXKqn
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.2.0
{"foo":{"password":"****"}}