PHP 魔术函数
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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