3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a1 = [1 => 'foo', 2 => 'bar']; $a2 = [3 => 'baz']; $a3 = []; var_dump($a1); var_dump(array_replace($a1, $a2)); var_dump(array_replace($a1, $a3));

preferences:
38.13 ms | 402 KiB | 5 Q