Fix handling of platform packages to be future proof, refs #3872

src/Composer/Json/JsonManipulator.php

@@ -12,6 +12,8 @@
 
 namespace Composer\Json;
 
+use Composer\Repository\PlatformRepository;
+
 /**
  * @author Jordi Boggiano <j.boggiano@seld.be>
  */
@@ -111,13 +113,14 @@ class JsonManipulator
     private function sortPackages(array &$packages = array())
     {
         $prefix = function ($requirement) {
+            if (preg_match(PlatformRepository::PLATFORM_PACKAGE_REGEX, $requirement)) {
                 return preg_replace(
                     array(
-                    '/^php$/',
-                    '/^hhvm$/',
-                    '/^ext-\w+$/',
-                    '/^lib-\w+$/',
-                    '/^.+$/',
+                        '/^php/',
+                        '/^hhvm/',
+                        '/^ext/',
+                        '/^lib/',
+                        '/^\D/',
                     ),
                     array(
                         '0-$0',
@@ -128,6 +131,9 @@ class JsonManipulator
                     ),
                     $requirement
                 );
+            }
+
+            return '5-'.$requirement;
         };
 
         uksort($packages, function ($a, $b) use ($prefix) {