W3cubDocs

/WordPress

rest_is_ip_address( string $ip )

Determines if an IP address is valid.

Description

Handles both IPv4 and IPv6 addresses.

Parameters

$ip

(string) (Required) IP address.

Return

(string|false) The valid IP address, otherwise false.

Source

File: wp-includes/rest-api.php

function rest_is_ip_address( $ip ) {
	$ipv4_pattern = '/^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$/';

	if ( ! preg_match( $ipv4_pattern, $ip ) && ! Requests_IPv6::check_ipv6( $ip ) ) {
		return false;
	}

	return $ip;
}

Changelog

Version Description
4.7.0 Introduced.

© 2003–2019 WordPress Foundation
Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/functions/rest_is_ip_address