3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $array = array('first'=>'111', 'second'=>'222', 'third'=>'333'); // get the first key: returns 'first' print array_shift(array_keys($array)); // get the last key: returns 'third' print array_pop(array_keys($array)); // get the first value: returns '111' print array_shift(array_values($array)); // get the last value: returns '333' print array_pop(array_values($array));
based on lnlOU
Output for 7.0.0 - 7.1.0
Notice: Only variables should be passed by reference in /in/PZDq1 on line 6 first Notice: Only variables should be passed by reference in /in/PZDq1 on line 9 third Notice: Only variables should be passed by reference in /in/PZDq1 on line 12 111 Notice: Only variables should be passed by reference in /in/PZDq1 on line 15 333
Output for 5.1.0 - 5.6.28
Strict Standards: Only variables should be passed by reference in /in/PZDq1 on line 6 first Strict Standards: Only variables should be passed by reference in /in/PZDq1 on line 9 third Strict Standards: Only variables should be passed by reference in /in/PZDq1 on line 12 111 Strict Standards: Only variables should be passed by reference in /in/PZDq1 on line 15 333
Output for 5.0.5
Fatal error: Only variables can be passed by reference in /in/PZDq1 on line 6
Process exited with code 255.
Output for 4.3.0 - 5.0.4
firstthird111333