Late Static Binding

gives us ability to call child class method from parent class. In this example

who()

method of child class will be called from parent class

test()

method

class A {
    public static function who() {
        echo __CLASS__;
    }
    public static function test() {
        static::who(); // Here comes Late Static Bindings
    }
}

class B extends A {
    public static function who() {
        echo __CLASS__;
    }
}

B::test();

Another example of late static binding: parent class uses child class property -

tableName

class Model
{
	protected static $tableName = 'Model';

	public static function getTableName()
	{
		return static::$tableName;
	}
}

class User extends Model
{
	protected static $tableName = 'User';
}

echo User::getTableName(); // User