I have a complete Form Creation System. There are many different Question Types and I have to check if the answer which the person had made is correct.
All types of Questions has its own class will is always called ItemClass and this Class is in its own File.
Everytime a Question is asked I include the File and there is the problem: I have to check different types of Questions in one PHP-File. And then there comes the error – ItemClass already declared.
Is there any method to unset a Class?
No, it is not possible to “undefine” an existing class.
In your case, you should not have several classes that all have the same name : each class should have a different / distinct name, and you should modify the way you are working with those, so your code deals with classes not named
For instance, you could have :
and so on — and those classes could all extend the same base class, if needed / if it makes sense.
(For a while, I thought maybe runkit could help with the “undefining a class” idea ; but there doesn’t seem to be a function to do that — and that extension is not quite stable and shouldn’t be used on a production server)
Once a class is decalred it cannot be ‘unset’
Maybe namespaces could be of use to you?
I tested your solutions and finally I got an Idea:
I renamed the Classes to each of it’s type (ynItemClass, markItemClass, …) and when I need a Item Type a made the following
$it = $item->item_type."ItemClass"; $test = new $it($smarty);
And it works!!
Have a nice Day!