Online PHP editor | refs for KKCSQ

<?php $haystack = 'abcdefghi'; $needle = 'acegi'; function charsExistInString($haystack, $needle) { $haystackChars = count_chars($haystack); var_dump($haystackChars); $needleChars = str_split($needle); foreach ($needleChars as $c) { if (!isset($haystackChars[$c])) { return false; } } return true; } var_dump(charsExistInString($haystack, $needle));