WordPress at a glance
function is not described

Requests_SSL::match_domain() public WP 1.0

Match a hostname against a dNSName reference

{} It's a method of the class: Requests_SSL{}

No Hooks.

Return

true/false. Does the domain match?

Usage

$result = Requests_SSL::match_domain( $host, $reference );
$host(string) (required)
Requested host
$reference(string) (required)
dNSName to match against

Code of Requests_SSL::match_domain() WP 5.5.1

<?php
public static function match_domain($host, $reference) {
	// Check if the reference is blocklisted first
	if (self::verify_reference_name($reference) !== true) {
		return false;
	}

	// Check for a direct match
	if ($host === $reference) {
		return true;
	}

	// Calculate the valid wildcard match if the host is not an IP address
	// Also validates that the host has 3 parts or more, as per Firefox's
	// ruleset.
	if (ip2long($host) === false) {
		$parts = explode('.', $host);
		$parts[0] = '*';
		$wildcard = implode('.', $parts);
		if ($wildcard === $reference) {
			return true;
		}
	}

	return false;
}