wpdb::parse_db_host( string $host )

Parse the DB_HOST setting to interpret it for mysqli_real_connect.


Description Description

mysqli_real_connect doesn’t support the host param including a port or socket like mysql_connect does. This duplicates how mysql_connect detects a port and/or socket file.


Parameters Parameters

$host

(string) (Required) The DB_HOST setting to parse.


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Return Return

(array|bool) Array containing the host, the port, the socket and whether it is an IPv6 address, in that order. If $host couldn't be parsed, returns false.


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Source Source

File: wp-includes/wp-db.php

	public function parse_db_host( $host ) {
		$port    = null;
		$socket  = null;
		$is_ipv6 = false;

		// First peel off the socket parameter from the right, if it exists.
		$socket_pos = strpos( $host, ':/' );
		if ( $socket_pos !== false ) {
			$socket = substr( $host, $socket_pos + 1 );
			$host = substr( $host, 0, $socket_pos );
		}

		// We need to check for an IPv6 address first.
		// An IPv6 address will always contain at least two colons.
		if ( substr_count( $host, ':' ) > 1 ) {
			$pattern = '#^(?:\[)?(?P<host>[0-9a-fA-F:]+)(?:\]:(?P<port>[\d]+))?#';
			$is_ipv6 = true;
		} else {
			// We seem to be dealing with an IPv4 address.
			$pattern = '#^(?P<host>[^:/]*)(?::(?P<port>[\d]+))?#';
		}

		$matches = array();
		$result = preg_match( $pattern, $host, $matches );

		if ( 1 !== $result ) {
			// Couldn't parse the address, bail.
			return false;
		}

		$host = '';
		foreach ( array( 'host', 'port' ) as $component ) {
			if ( ! empty( $matches[ $component ] ) ) {
				$$component = $matches[ $component ];
			}
		}

		return array( $host, $port, $socket, $is_ipv6 );
	}

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Changelog Changelog

Changelog
Version Description
4.9.0 Introduced.


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