3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $array = array("person1" => array(0 => array('k1'=>'v1', 'k2'=>'v2'), 1 => array('k1'=>'v1', 'k2'=>'v2')), "person2" => array(0 => array('k1'=>'v1', 'k2'=>'v2'), 1 => array('k1'=>'v1', 'k2'=>'v2'))); $reset = reset($array); echo $reset[0]['k1']; print_r(array_flip($reset[0]));
based on 9PRgm
Output for 4.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
v1Array ( [v1] => k1 [v2] => k2 )
Output for hhvm-3.10.0

Process exited with code 153.