3v4l.org

run code in 300+ PHP versions simultaneously
<?php $fruits = array("d" => "lemon", "a" => "orange", "b" => "banana", "c" => "apple"); function test_alter(&$item1, $key, $prefix) { $item1 = "$prefix: $item1"; } function test_print($item2, $key) { echo "$key. $item2<br />\n"; } echo "До ...:\n"; array_walk($fruits, 'test_print'); array_walk($fruits, 'test_alter', 'fruit'); echo "... и после:\n"; //array_walk($fruits, 'test_print');

preferences:
56.04 ms | 402 KiB | 5 Q