3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a=preg_replace('/(\$|\\\\)/', '\\\\\1','da$i$1tg\\ut\\1'); print preg_replace('/foo/', $a, 'barfoobaz');
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
barda$i$1tg\ut\1baz