静态绑定与拦截器学习心得

//说明：基类和调用者都有：say()方法，默认指向基类的那个say();运行结果应该显示：'1'

//当基类中使用了：return static::say()后，指向为调用者的那个say();运行结果应该显示：'2'

     class Eee{

         public static function say(){

              echo '1<br>';

         }

    

         public static function beCaller(){

              return static::say();

         }

     }

    

     class Fff extends Eee{

         public static function say(){

              echo '2<br>';

         }

     }

    

     Fff::say();

//私有属性的访问和修改

     class Ggg{

         private $aa;

         private $bb;

        

         public function __construct($cc,$dd){

             $this->aa=$cc;

             $this->bb=$dd;

         }

    

         public function __get($ee){

             $method='get'.ucfirst($ee);

             if(method_exists($this, $method)){

                  return $this->$method();

             }else {

                  return null;

             }

         }

    

         public function getName(){

              return $this->aa.'<br>';

         }

    

         public function getPrice(){

              return $this->bb.'<br>';

         }

    

         public function __set($property,$value){

             $method='set'.ucfirst($property);

             if(method_exists($this, $method)){

                  return $this->$method($value);

             }else {

                  return null;

             }

         }

    

         private function setAa($value){

              $this->aa=trim($value);

         }

    

         private function setBb($value){

              $this->bb=$value;

         }

    

     }

    

     $ggg=new Ggg('初值', 1000);

     echo $ggg->aa;

     echo $ggg->bb;

    

     $ggg->aa='重写值';

     $ggg->bb=2000;

    

     echo '<hr>';

     echo $ggg->aa;

     echo $ggg->bb;

//方法拦截器

     class Hhh{

         public function __call($ff,$gg){

              printf('方法名：%s,参数：[%s]',$ff,implode(',',$gg));

          }

     }

    

     $hhh=new Hhh();

     $hhh->demo(1,2,3,4);

     echo '<br>';