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I've been developing in PHP for a while now, and I still have not had a task where I've had to use variable variables. Can anyone give me examples where using them is a good idea ? Or were they included in the language just for fun ?
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Never use them; an "array" is always a better solution.
I generally find them in places where the code smells bad. Maybe references a static configuration variable etc... But why wouldn't the usual associative array have been a better solution. Seems like a security hole waiting to happen.
I suppose you might be able to use them in templates effectively.