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PHP MCQs

In PHP5, what is the difference between using self and $this, and when is each appropriate?

$this is for use in static member functions to allow access to static member variables. Use self in non-static member functions, and as a reference to the instance of the class on which the member function was called.

self is for use in static member functions to allow access to static member variables. $this is used in non-static member functions, and is a reference to the instance of the class on which the member function was called, but also allows access to static member functions.

The self keyword does not exist.

There is no difference between the two keywords; it is simply syntactic sugar.

Answer

Correct Answer: self is for use in static member functions to allow access to static member variables. $this is used in non-static member functions, and is a reference to the instance of the class on which the member function was called, but also allows access to static member functions.

Explanation:

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