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What's an actual use of variable variables?
OK, this question may look a little bit point-whoreish, but I'd really like to know: when are variable variables useful? I haved programmed in PHP for several years, but I've never used them. For me it looks rather funny than useful.
What are some real life examples of variable variables?
Update:
I'm really sorry about your votes. The linked 'duplicate' may be really a dupe except one thing: the examples listed there show me why not to use variable variables.
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Never. This feature should be banned from the language as well as its other children diseases such as register globals, magic quotes, etc.
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