wpdb::parse_db_host( string $host ): array|false

2071	public function parse_db_host( $host ) {2072		$socket  = null;2073		$is_ipv6 = false;2074 2075		// First peel off the socket parameter from the right, if it exists.2076		$socket_pos = strpos( $host, ':/' );2077		if ( false !== $socket_pos ) {2078			$socket = substr( $host, $socket_pos + 1 );2079			$host   = substr( $host, 0, $socket_pos );2080		}2081 2082		/*2083		 * We need to check for an IPv6 address first.2084		 * An IPv6 address will always contain at least two colons.2085		 */2086		if ( substr_count( $host, ':' ) > 1 ) {2087			$pattern = '#^(?:\[)?(?P<host>[0-9a-fA-F:]+)(?:\]:(?P<port>[\d]+))?#';2088			$is_ipv6 = true;2089		} else {2090			// We seem to be dealing with an IPv4 address.2091			$pattern = '#^(?P<host>[^:/]*)(?::(?P<port>[\d]+))?#';2092		}2093 2094		$matches = array();2095		$result  = preg_match( $pattern, $host, $matches );2096 2097		if ( 1 !== $result ) {2098			// Couldn't parse the address, bail.2099			return false;2100		}2101 2102		$host = ! empty( $matches['host'] ) ? $matches['host'] : '';2103		// MySQLi port cannot be a string; must be null or an integer.2104		$port = ! empty( $matches['port'] ) ? absint( $matches['port'] ) : null;2105 2106		return array( $host, $port, $socket, $is_ipv6 );2107	}
When	Instructions	Calls it makes
always	22–42	`substr_count(), preg_match()`
`$result === 1 && !empty($matches)`	40–48	`substr_count(), preg_match(), absint()`
PHP	Compiled	Executed	Branches	Notes
8.6-dev	51	22–47	5	1 fewer instruction than PHP 8.5
8.5	52	22–48	5
8.4	52	22–48	5	10 fewer instructions than PHP 8.3
8.3	62	25–58	5
8.2	62	25–58	5
8.1	62	25–58	5	1 fewer instruction than PHP 7.4
7.4	63	25–59	5