remove StringRef

Author: frederikbosch

tests/003.phpt

@@ -23,8 +23,8 @@ echo "\n";
 ?>
 --EXPECT--
 string(11) "Jason Young"
-string(12) "Yangshengjie"
 {"author":"Yangshengjie","age":23}
+string(12) "Yangshengjie"
 int(23)
 int(24)
 {"author":"Yangshengjie","age":24}