3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?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');
based on vEDAa
Output for 4.3.0 - 7.2.0
До ...: d. lemon<br /> a. orange<br /> b. banana<br /> c. apple<br /> ... и после: d. lemon<br /> a. orange<br /> b. banana<br /> c. apple<br />