Analysis of final keyword usage in PHP

This example describes the final keyword usage in PHP. Share to everyone for your reference, 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 not inherit from final Class (person)

Methods marked with the final keyword 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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