Try with array_intersect
, array_map
and explode
$a = "key1, key2, key3";
$b = "key3, key4, key5";
$intersect = array_intersect(array_map('trim',explode(",",$a)), array_map('trim',explode(",",$b)));
if ($intersect) {
echo 'Great Is Found';
var_dump($intersect);
}