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Yaf_Dispatcher::__clone() method is used to prevent cloning of the Yaf_Dispatcher object. Cloning a Yaf_Dispatcher object can result in unexpected behavior, as it could lead to multiple instances of the dispatcher managing the same request.

By implementing __clone() method and making it private, the Yaf_Dispatcher class ensures that cloning of the object is not allowed. This helps maintain the integrity of the request handling process in a Yaf application.

Here is an example to illustrate the use of __clone() in Yaf_Dispatcher:

php
class CustomDispatcher extends Yaf_Dispatcher {
private function __clone() {
// Prevent cloning of the object
}
}

$dispatcher = new CustomDispatcher();
$clone = clone $dispatcher; // This will result in an error


In the above example, if you attempt to clone the $dispatcher object, it will throw an error because the __clone() method is private and prevents cloning.