PHP 魔术函数

Jun 23, 2016 pm 02:30 PM

PHP魔术函数

class Person{    private $name;    private $age;    private $sex;    public function __construct($name,$age,$sex){        $this->name=$name;        $this->age=$age;        $this->sex=$sex;    }    public function __get($property){        if(isset($this->$property)){            return $this->$property;        }        else{            return null;        }    }    public function __set($property,$value){        $this->$property=$value;    }    //当在类外部使用isset()函数测定私有成员$nm时,自动调用    public function __isset($property){        return isset($this->$property);    }    //当在类外部使用unset()函数来删除私有成员时自动调用的    public function __unset($property){        unset($this->$property);    }    //在对象外部直接调用echo 对象名 的时候自动调用__toString()    public function __toString(){        return "hello world"."<br/>";    }    //在对象外面调用clone时,自动调用__clone()    public function __clone(){        $this->name="I am clone object";    }    //在对象外部调用对象没有的方法和参数的时候,取代报错,自动调用__call函数    public function __call($function_name, $args)    {        print "你所调用的函数:$function_name(参数:";        print_r($args);        print ")不存在!<br>\n";    }    //在对对象进行串行化的时候serialize,自动调用__sleep()    public function __sleep(){            }    //在对象进行反序列化的时候unserialize,自动调用wakeup()    public function __wakeup(){            }}function __autoload($classname){        require_once($classname.".php");}
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