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run code in 200+ php & hhvm versions
Bugs & Features
<?php $fruits = array("d" => "lemon", "a" => "orange", "b" => "banana", "c" => "apple"); function test_print($item, $key) { echo "$key. $item<br />\n"; } echo "Before ...:\n"; array_walk($fruits, 'test_print'); array_walk($fruits, 'test_print'); ?>
Output for 4.3.0 - 7.2.0
Before ...: d. lemon<br /> a. orange<br /> b. banana<br /> c. apple<br /> d. lemon<br /> a. orange<br /> b. banana<br /> c. apple<br />