wp_kses_bad_protocol_once2( string $scheme, string[] $allowed_protocols ): string

1917function wp_kses_bad_protocol_once2( $scheme, $allowed_protocols ) {1918	$scheme = wp_kses_decode_entities( $scheme );1919	$scheme = preg_replace( '/\s/', '', $scheme );1920	$scheme = wp_kses_no_null( $scheme );1921	$scheme = strtolower( $scheme );1922 1923	$allowed = false;1924	foreach ( (array) $allowed_protocols as $one_protocol ) {1925		if ( strtolower( $one_protocol ) === $scheme ) {1926			$allowed = true;1927			break;1928		}1929	}1930 1931	if ( $allowed ) {1932		return "$scheme:";1933	} else {1934		return '';1935	}1936}