protected

<?php

/** * Created by IntelliJ IDEA. * User: Administrator * Date: 2017/1/21 * Time: 14:16 * public,private,protected的区别 *public:权限是最大的,可以内部调用,实例调用等。 *protected: 受保护类型,用于本类和继承类调用。 *private: 私有类型,只有在本类中使用。 */error_reporting(E_ALL);

class test{    public $public;    private $private;    protected $protected;    static $instance;    public  function __construct(){        $this->public    = ‘public     <br>‘;        $this->private   = ‘private    <br>‘;        $this->protected = ‘protected  <br>‘;    }    static function tank(){        if (!isset(self::$instance[get_class()]))        {            $c = get_class();            self::$instance = new $c;        }        return self::$instance;    }    public function pub_function() {        echo "you request public function<br>";        echo $this->public;        echo $this->private;        //private,内部可以调用        echo $this->protected;      //protected,内部可以调用        $this->pri_function();      //private方法,内部可以调用        $this->pro_function();      //protected方法,内部可以调用    }    protected  function pro_function(){        echo "you request protected function<br>";    }    private function pri_function(){        echo "you request private function<br>";    }}$test = test::tank();echo $test->public;echo $test->private;    //Fatal error: Cannot access private property test::$privateecho $test->protected;  //Fatal error: Cannot access protected property test::$protected$test->pub_function();$test->pro_function();  //Fatal error: Call to protected method test::pro_function() from context$test->pri_function();  //Fatal error: Call to private method test::pri_function() from context
时间: 01-19

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