Differences Between Abstract Class And Interface

  • In abstract classes this is not necessary that every method should be abstract. But in interface every method is abstract.
  • Multiple and multilevel both type of inheritance is possible in interface. But single and multilevel inheritance is possible in abstract classes.
  • Method of php interface must be public only. Method in abstract class in php could be public or protected both.
  • In abstract class you can define as well as declare methods. But in interface you can only defined your methods.
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