3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $fruits = array("d" => "lemon", "a" => "orange", "b" => "banana", "c" => "apple"); function pram_alter($array, $key) { echo "@$key = .'$array'. ,\n;"; } array_walk($fruits, 'pram_alter'); ?>
based on Zh9pQ
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
@d = .'lemon'. , ;@a = .'orange'. , ;@b = .'banana'. , ;@c = .'apple'. , ;