Is it possible to redefine a constant in php?

Today we will see if can or not can redefine a constant in PHP.

There's dry answer to this question, and the answer is NO!

Precisely by its nature, as a constant, it is not possible to change its value. The constants in php are born precisely to remain precisely constant while using your scripts; might seem like a limit instead; just their strength.

The alternative is to use traditional variables, to which it is always possible to change value at any time.