3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $data = array('mail' => 'foo', 'bar' => 'baz'); var_dump(array_key_exists('mail', $data));
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
bool(true)