Final keyword usage analysis _php techniques in PHP

This example describes the final keyword usage in PHP. Share to everyone for your reference, specific as follows:

The final keyword can only be used to define classes and define methods.

Classes marked with the final keyword cannot be inherited

Final class person{...
}
Class Student extends person{...
}

An error message will appear. Fatal error:class Student may isn't inherit from final Class (person)

Methods that use the final keyword tag cannot be overridden by a quilt class

Class person{
   final function Say () {
     ...
   }
} Class Student extends person{
  function Say () {
    ...
  }
}

The following error will appear:

Fatal error:cannot Override Final Method Person::say ()

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