Online PHP editor | output for 4EndJ

<?php $return = filter_var("223.255.255.255", FILTER_VALIDATE_IP, FILTER_FLAG_NO_RES_RANGE); var_dump($return); $return = filter_var("224.0.0.0", FILTER_VALIDATE_IP, FILTER_FLAG_NO_RES_RANGE); var_dump($return); $return = filter_var("224.0.0.2", FILTER_VALIDATE_IP, FILTER_FLAG_NO_RES_RANGE); var_dump($return); $return = filter_var("224.0.0.255", FILTER_VALIDATE_IP, FILTER_FLAG_NO_RES_RANGE); var_dump($return); $return = filter_var("224.0.1.0", FILTER_VALIDATE_IP, FILTER_FLAG_NO_RES_RANGE); var_dump($return); $return = filter_var("224.1.0.0", FILTER_VALIDATE_IP, FILTER_FLAG_NO_RES_RANGE); var_dump($return); $return = filter_var("225.0.0.0", FILTER_VALIDATE_IP, FILTER_FLAG_NO_RES_RANGE); var_dump($return);