OOp -> Autoload

Autoload: As its name denote autoload is property of a OOP that enable to load a class dynamically. It means when you create an object of class, It will called __autoload function that include file.

See in below example

function __autoload($class_name) {
    include $class_name . '.php';
}

$obj  = new MyClass1();
$obj2 = new MyClass2(); 

if you have "MyClass1.php" and "MyClass2.php" in same directory, it will include automatically else will generate error.