Many differences occur between the interface and abstract class in php.

  • Abstract methods can declare with protected, public, private. But in case of Interface methods stated with the public.
  • Abstract classes can have method stubs, constants, members, and defined processes, but interfaces can only have constants and methods stubs.
  • Abstract classes do not support multiple inheritance but interface support this.
  • Abstract classes can contain constructors, but the interface does not support constructors.

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