Changing array to be an associative array so that the Name function can work with non-sequential enums as well as those beginning at something other than zero. (#5151)

Also including the resulting changes in php files.

tests/MyGame/Example/AnyUniqueAliases.php

@@ -11,10 +11,10 @@ class AnyUniqueAliases
     const M2 = 3;
 
     private static $names = array(
-        "NONE",
-        "M",
-        "T",
-        "M2",
+        AnyUniqueAliases::NONE=>"NONE",
+        AnyUniqueAliases::M=>"M",
+        AnyUniqueAliases::T=>"T",
+        AnyUniqueAliases::M2=>"M2",
     );
 
     public static function Name($e)