3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php function format(&$collection) { foreach($collection as $k => $v) { $collection["prefix_{$k}"] = $v; } } $collection = array('a' => 1, 'b' => 2, 'c' => 3); format($collection); var_dump($collection);
Output for 7.0.20 - 7.2.0
array(6) { ["a"]=> int(1) ["b"]=> int(2) ["c"]=> int(3) ["prefix_a"]=> int(1) ["prefix_b"]=> int(2) ["prefix_c"]=> int(3) }
Output for 5.4.0 - 5.4.15
Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 14606 bytes) in /in/tPMTZ on line 4
Process exited with code 255.
Output for 5.3.0 - 5.3.25
Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 14506 bytes) in /in/tPMTZ on line 4
Process exited with code 255.