PHP Static Binding Details

This article simply describes the static bindings in PHP, for the static bindings in PHP is not so familiar with the students can take a look at this article about the static binding of PHP Oh!

Late static binding works by storing the class name on the previous "non-forwarding call" ( non-forwarding call ).

• When a static method call is made, the class name is the one explicitly specified (usually in the left part of the: operator);

• When a non-static method call is made, the class to which the object belongs.

The so-called "forwarding Call" ( forwarding call ) refers to static calls made in the following ways: self:: , parent:: static:: as well forward_static_call() . get_called_class()a function is available to get the class name of the method being called, and static:: its scope is indicated.

Self:: the limit

Use self:: or a static reference to the current class, depending on the class in which the current method is defined:

Cases:

Class  A  {public    static function who  () {        echo  CLASS;    }    public static function  test () {self         :: Who ();    }} Class  B  extends  A  {public    static function who  () {        echo  CLASS;    }} B:: Test ();

Results:

A

Above all the content of this article, we have seen after must feel very confused, I hope you can combine examples to see and achieve their own two articles!

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