3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = [ [ 'foo' => 1 ], [ 'foo' => 2.5 ], [ 'foo' => 2 ], [ 'foo' => '2' ], ]; var_dump(array_column($a, 'foo', 'foo'));
based on gRveA
Output for 5.6.30, hhvm-3.18.5 - 3.22.0, 7.0.30 - 7.3.0beta1
array(2) { [1]=> int(1) [2]=> string(1) "2" }