1 <?php
  2     #自动加载方法,当new一个class时,若class未被引入,则会自动调用__autoload()方法
  3     function __autoload($className) {
  4         include $className . ".php";
  5     }
  6
  7     class Son {
  8         private $name;
  9
 10         public function __construct($name) {
 11             $this->name = $name;
 12         }
 13
 14         #echo输出类时,自动调用此方法
 15         public function __toString() {
 16             return $this->name;
 17         }
 18     }
 19
 20     class Man {
 21         private $name;
 22         private $age;
 23         private $son;
 24
 25         public function __construct($name, $age, Son $son) {
 26             $this->name = $name;
 27             $this->age = $age;
 28             $this->son = $son;
 29         }
 30
 31         #析构方法,当脚本结束或调用unset()时执行此方法
 32         public function __destruct() {
 33             echo "Destruct: I'm {$this->name}, I was killed at " . date("Y-m-d H:i:s") . "<br>";
 34         }
 35
 36         public function __toString() {
 37             return "toString: I'm {$this->name}, and {$this->age} years old, my son is {$this->son}.<br>";
 38         }
 39
 40         #当调用一个不存在的function时,自动调用此方法
 41         public function __call($funcName, $args) {
 42             echo "Call: You call func \"{$funcName}\" with args \"" . serialize($args) . "\" ? It's not existed.<br>";
 43         }
 44
 45         #当调用一个不存在的static function时,自动调用此方法
 46         public static function __callStatic($funcName, $args) {
 47             echo "callStatic: You call static func \"{$funcName}\" with args \"" . serialize($args) . "\" ? It's not existed.<br>";
 48         }
 49
 50         #当调用get而$varName不存在时,自动调用此方法
 51         public function __get($varName) {
 52             return "Get: You call the variable \"{$varName}\" ? It's not existed.<br>";
 53         }
 54
 55         #当调用set而$varName不存在时,自动调用此方法
 56         public function __set($varName, $val) {
 57             echo "Set: You want to assign value \"{$val}\" to variable \"{$varName}\" ? It's not existd.<br>";
 58         }
 59
 60         #当调用isset而$varName不存在时,自动调用此方法
 61         public function __isset($varName) {
 62             echo "Isset: Tell you, the variable \"{$varName}\" is not existed.<br>";
 63         }
 64
 65         #当调用unset而$varName不存在时,自动调用此方法
 66         public function __unset($varName) {
 67             echo "Unset: Tell you, the variable \"{$varName}\" has never been existed.<br>";
 68         }
 69
 70         #调用serialize()前,会先执行此方法,serialize()只序列化__sleep()方法返回的成员变量
 71         public function __sleep() {
 72             return array("name");
 73         }
 74
 75         #调用unserialize()前,会先执行此方法
 76         public function __wakeup() {
 77             $this->age = "21";
 78         }
 79
 80         #当将class当做function调用时,会执行此方法
 81         public function __invoke($var) {
 82             echo "You want to invoke class \"" . __CLASS__ . "\" as a func with args \"{$var}\"? No! That's wrong!<br>";
 83         }
 84
 85         #调用clone时,会执行此方法
 86         public function __clone() {
 87             $this->son = clone $this->son;    #此处进行深复制,强制将对象型成员变量复制一份新拷贝,否则只是复制对象引用
 88         }
 89     }
 90
 91     $man = new Man("Jack", 18, new Son("Dick"));
 92     $man->smoke("Camle cigarette");    #测试__call()
 93     Man::drink(array("juice", "water"));    #测试__callStatic()
 94     echo $man->wife;    #测试__get()
 95     $man->wife = "Rose";    #测试__set()
 96     isset($man->daughter);    #测试__isset()
 97     unset($man->daughter);    #测试__unset()
 98     echo serialize($man) . "<br>";    #测试__sleep()
 99     echo unserialize(serialize($man));    #测试__wakeup()
100     $man("kiss");    #测试__invoke()
101     $manNew = clone $man;    #测试__clone()
102     echo $manNew;
103     $woman = new Woman();    #测试__autoload()
104 ?>