Question:What is object cloning?
To remedy the problems with copying, PHP offers an explicit means for cloning an object is known as object cloning.
Question:
What type of inheritance that PHP supports?
PHP generally supports single type of inheritance.Allthough All inheritance are supported but multiple not supported and replace by inheritance used in PHP5.
Question:Are Parent constructors called implicitly inside a class constructor?
No, a parent constructor have to be called explicitly as follows: parent::constructor($value)
Question:What does $_SERVER means?
$_SERVER is an array including information created by the web server such as paths, headers, and script locations.
Question:Define exceptions?
When a specified error (exceptional) condition occurs in the script is called an exception.
There are Four important keywords of exceptions:
Try
Catch
Throw
Finaly