Till which version of PHP, developers were forced to name their files in a global context?

Which method is invoked when an undefined property is accessed ?

__clone() is run on the ___ object.

Which keyword must be added before $first variable on the third line of the above question to make $second and $first as distinct objects in PHP 5?

Which method introduced in PHP 5, is invoked just before an object is garbage collected?

Which one of the following method is invoked when an undefined method is called by client code?

Which one of the following method is invoked when a value is assigned to an undefined property?

PHP recognizes constructors by the name..

Which method scope prevents a method from being overridden by a subclass?

PHP provides built-in interceptor methods, which can intercept messages sent to undefined methods and properties. This is also known as ___.