Change UTF8 decode to mbstring (#35)

* Change UTF8 decode to mbstring

* Revert polyfill and check if module exists

composer.json

@@ -6,7 +6,10 @@
     "homepage": "https://github.com/joomla-framework/uri",
     "license": "GPL-2.0-or-later",
     "require": {
-        "php": "^7.2.5|~8.0.0|~8.1.0"
+        "php": "^7.2.5|~8.0.0|~8.1.0|~8.2.0"
+    },
+    "suggest": {
+        "ext-mbstring": "Used to speed up url parsing"
     },
     "require-dev": {
         "joomla/coding-standards": "^3.0@dev",

src/UriHelper.php

@@ -33,7 +33,7 @@ public static function parse_url($url, $component = -1)
 		$result = [];
 
 		// If no UTF-8 chars in the url just parse it using php native parse_url which is faster.
-		if (utf8_decode($url) === $url)
+		if (extension_loaded('mbstring') && mb_convert_encoding($url, 'ISO-8859-1', 'UTF-8') === $url)
 		{
 			return parse_url($url, $component);
 		}