Answer Posted / pushpendra kumar

There are several differences between PHP4 and PHP5.
1.Unified constructor and Destructor.
2.Exception has been introduced.
3.New error level named E_STRICT has been introduced.
4.Now we can define full method definintions for a abstract
class.
4.Within a class we can define class constants.
5.we can use the final keyword to indicate that a method
cannot be overridden by a child

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