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Possible Duplicate:
When should I use “final”?
PHP has a keyword ‘final’,
Could you give me an example in real world that use this keyword.
I just don’t know when to use.
In a real world, let’s say you are a senior developer and you wrote some base class, and told those junior guys your idea and let them code the rest classes, and you don’t trust them and want to 100% make sure they will not try to override some certain method and make the system crash.