Q: What is final class in php?

when we make a final class then we cannot inherit.

Using final keyword a class can not be inherited and a method can not be overridden.

Final keyword prevents child classes from overriding a method of super or parent class. If we declare a class as final then it could not have any child class that means no class can inherit the property of this class

PHP Final Keyword Example:

<?php

class A

{

final public function disp(){

echo "Inside the final function";

}

}

class B extends A

{

function disp(){

echo "Inside the final function";

}

}

$obj=new B();

$obj->disp();

?> 

Output:

Fatal error: Cannot override final method A::disp() in C:\xampp\htdocs\PHP-AJAX\final.php on line 14

Example:

<?php

final class A

{

public function disp(){

echo "Inside the final function";

}

}

class B extends A

{

function disp(){

echo "Inside the final function";

}

}

$obj=new B();

$obj->disp();

?>

Output:
Fatal error: Class B may not inherit from final class (A) in C:\xampp\htdocs\PHP-AJAX\final.php on line 14