3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $test = array( array('a' => 'testA', 'b' => 'testB'), array('a' =>'testC', 'b' => 'testD') ); print_r(array_keys($test, array('a' => 'testA', 'b' => 'testB')));
Output for 4.3.0 - 7.1.0
Array ( [0] => 0 )