3v4l.org

run code in 300+ PHP versions simultaneously
<?php $products = array(5,6,7); $kp = "test:"; foreach (array_map(function($product) use ($kp) { return $kp . $product; }, $products) as $product) { echo $product . "\n"; }

preferences:
66.74 ms | 402 KiB | 5 Q