UriComparator.php
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UriComparator.php
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	<?php

	declare(strict_types=1);

	namespace GuzzleHttp\Psr7;

	use Psr\Http\Message\UriInterface;

	/**
	* Provides methods to determine if a modified URL should be considered cross-origin.
	*
	* @author Graham Campbell
	*/
	final class UriComparator
	{
	/**
	* Determines if a modified URL should be considered cross-origin with
	* respect to an original URL.
	*/
	public static function isCrossOrigin(UriInterface $original, UriInterface $modified): bool
	{
	if (\strcasecmp($original->getHost(), $modified->getHost()) !== 0) {
	return true;
	}

	if ($original->getScheme() !== $modified->getScheme()) {
	return true;
	}

	if (self::computePort($original) !== self::computePort($modified)) {
	return true;
	}

	return false;
	}

	private static function computePort(UriInterface $uri): int
	{
	$port = $uri->getPort();

	if (null !== $port) {
	return $port;
	}

	return 'https' === $uri->getScheme() ? 443 : 80;
	}

	private function __construct()
	{
	// cannot be instantiated
	}
	}