Pitfall of Defining Constants
The PHP define statement is really handy. I've used it to define all kind of constants. But recently I stumbled across a pitfall when I defined a constant name two different ways different if clauses. In the true clause, I defined it one way, while defining it another way in the false clause. The constant never changes. Two things I learned from this exercise.
Knowing these constraints, I started developing my software more carefully, using scoped class variables, rather than using constants all the time. You might end up stepping on yourself quite often if you keep defining global constants.
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