3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $foo = [ 'a' => '1', 'b' => '1', 'c' => '2', ]; $bar = array_map(function($v) { return '#' . $v; }, array_combine(array_keys($foo), array_keys($foo))); $foo_new = array_combine($bar, $foo); var_dump($foo_new);
based on P24SJ
Output for 5.4.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
array(3) { ["#a"]=> string(1) "1" ["#b"]=> string(1) "1" ["#c"]=> string(1) "2" }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/PO2EC on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/PO2EC on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/PO2EC on line 3
Process exited with code 255.