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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

+    }

+}