This is already done, even methods do not support strict data type hinting.

TODO

@@ -9,8 +9,6 @@ Below list contains things that should be changed/fixed/implemented.
 
 3. Methods declaration / definition still uses function keyword.
 
-4. PH7_OP_DONE operator should check if return value match the data type of declared method/closure.
+4. Some builtin functions like isset() seems to be useless, if varaible is not defined, interpreter will throw an error.
 
-5. Some builtin functions like isset() seems to be useless, if varaible is not defined, interpreter will throw an error.
-
-6. Interpreter should verify that Program::main() returns a value of int or void data type.
+5. Interpreter should verify that Program::main() returns a value of int or void data type.