What is function overloading and overriding in php

Question

What is function overloading and function overriding? and what is the difference between both of them?

Answer 1

Overloading: defining functions that have similar signatures, yet have different parameters.

Overriding: is only pertinent to derived classes, where the parent class has defined a method and the derived class wishes to override that method.

Example(Overriding):

<?php

class Foo {
   function myFoo() {
      return "Foo";
   }
}

class Bar extends Foo {
   function myFoo() {
      return "Bar";
   }
}

$foo = new Foo;
$bar = new Bar;
echo($foo->myFoo()); //"Foo"
echo($bar->myFoo()); //"Bar"
?>

I hope this helps you.