PHP new Self () and new Static ()

classA { Public Static functionget_self () {return NewSelf (); }    Public Static functionget_static () {return New Static(); }} classBextendsA {}Echo Get_class(B::get_self ());//AEcho Get_class(B::get_static ());//B
echo Get_class (A::get_self ()); // A   
Echo Get_class(A::get_static ());//A

Self refers to the parsing context, not the calling context. In the example, self is parsed into a that defines get_self (), rather than the B that resolves to call self.

The concept of lazy static binding is introduced in php5.3, and the most obvious sign of this feature is the new keyword static. Static refers to the class being called. In the example, b::get_static () will produce a new B, instead of instantiating a

PHP new Self () and new Static ()