3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function foo() { return '42'; } echo preg_replace("//e/", "foo()", "meh");
Output for 4.3.11 - 5.6.28, 7.0.0 - 7.1.0
Warning: preg_replace(): Unknown modifier '/' in /in/mgnnM on line 4
Output for hhvm-3.10.0 - 3.12.0
Warning: Unknown modifier '/': [//e/] in /in/mgnnM on line 4
Output for 4.3.0 - 4.3.10
Warning: Unknown modifier '/' in /in/mgnnM on line 4