Magic method __tostring __debugInfo __call

__tostring Trigger timing: when the echo of an object triggers

This function requires a return string

 

__debugInfo Trigger timing: var_dump triggered when an object

This function needs to return an array

 

__call Trigger timing: when to call an object method does not exist trigger

Parameters a: function name

Two parameters: the array is a function of the parameters are stored in this array

 

<?php

    class Person{
       public $name;
       public $age;
       public $height;

       public function __tostring()
       {
           return '我散步回来了！';
       }
      public function __debugInfo()
       {
           return ['age','height'];
       }

       public function test(){
           echo '这是test方法';
       }

       public function __call($name,$value)
       {
           var_dump($name,$value);
       }

    }

    $niu = new Person();
    //echo $niu;
    //var_dump($niu);
    $niu->demo(1,2,3);