Online PHP editor | refs for 5YHJH

<?php var_dump(filter_var('example.com', FILTER_VALIDATE_URL, FILTER_FLAG_SCHEME_OPTIONAL)); var_dump(filter_var('//example.com', FILTER_VALIDATE_URL, FILTER_FLAG_SCHEME_REQUIRED)); var_dump(filter_var('/index.php', FILTER_VALIDATE_URL, FILTER_FLAG_SCHEME_OPTIONAL|FILTER_FLAG_HOST_OPTIONAL)); var_dump(filter_var('/index.php', FILTER_VALIDATE_URL, FILTER_FLAG_SCHEME_REQUIRED|FILTER_FLAG_HOST_REQUIRED));