PHP late static binding example sharing

1. The working principle of late static binding is to store the class name in the previous "non-forwarding call" (non-forwarding call). When making a static method call, the class name is the one explicitly specified (usually on the left side of the :: operator); when making a non-static method call, it is the class to which the object belongs. This feature is named "late static binding" from a language-internal perspective. "Late binding" means that static:: is no longer resolved to the class in which the current method is defined, but is calculated at actual runtime.

2. Test example:

class A{    public function run()    
{        static::test(); //后期静态绑定        
self::test(); //不是后期静态绑定    }    
public static function test()    
{        echo 'A Class
';    
}}class B extends A
{    public static function test()   
{        echo 'B Class
';    }}
$a = new B();$a->run();
//输出结果
//B Class
//A Class

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Detailed description of a late static binding in Laravel

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