Online PHP editor | output for KsmfL

<?php function arrpos(array $haystack, array $needle) { $len1 = count($haystack); $len2 = count($needle); if ($len2 > $len1) { return false; } for ($i = 0; $i <= $len1 - $len2; $i++) { if ($haystack[$i] === $needle[0]) { for ($j = 1; $j < $len2; $j++) { if ($haystack[$i + $j] !== $needle[$j]) { continue 2; } } return $i; } } return false; } $needle = [2,4]; var_dump(arrpos([1,2,3,4], $needle)); var_dump(arrpos([1,2,4,3], $needle)); var_dump(arrpos([1,2,2,4,3], $needle)); var_dump(arrpos([1,2,3,4,5], [2,3,4,5]));