RazaChohan

$arr1 = ['a', 'b', 'c'];
$arr2 = ['b', 'c', 'd'];
$intersectionArray = [];
foreach($arr2 as $key => $char) {
	$arr2[$char] = $char;
	unset($arr2[$key]);
}
foreach($arr1 as $char) {
	if(isset($arr2[$char])) {