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run code in 200+ php & hhvm versions
Bugs & Features
<?php $c = json_encode(["foo"=>["password"=>"foo\\\"bar"]]); echo $c; echo preg_replace('{("password"\s*:\s*)"(?:\\\\\\\\)*"}', '$1"****"');
based on iF59e
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.2.0
{"foo":{"password":"foo\\\"bar"}} Warning: preg_replace() expects at least 3 parameters, 2 given in /in/EGQCq on line 5