<?php
 
class Magic
{
  public $var = 'test';
 
  //構(gòu)造函數(shù),在創(chuàng)建對象的時候調(diào)用
  public function __construct()
  {
    echo '__construct called'.PHP_EOL;
  }
 
  //某個對象的引用都被刪除、對象被銷毀、調(diào)用exit()后、腳本關(guān)閉時被調(diào)用
  public function __destruct()
  {
    echo '__destruct called'.PHP_EOL;
  }
 
  //當(dāng)給不可訪問或不存在屬性賦值時被調(diào)用
  public function __set($name, $value)
  {
    echo $name.'-'.$value;
    echo '__set called'.PHP_EOL;
  }
 
  //讀取不可訪問或不存在屬性時被調(diào)用
  public function __get($name)
  {
    echo $name;
    echo '__get called'.PHP_EOL;
  }
 
  //調(diào)用不可訪問或不存在的方法時被調(diào)用
  public function __call($name, $arguments)
  {
    echo $name . '-' . implode(',', $arguments);
    echo '__call called'.PHP_EOL;
  }
 
  //調(diào)用不可訪問或不存在的靜態(tài)方法時被調(diào)用
  public static function __callStatic($name, $arguments)
  {
    echo $name . '-' . implode(',', $arguments);
    echo '__callStatic called'.PHP_EOL;
  }
 
  //對不可訪問或不存在的屬性調(diào)用isset()或empty()時被調(diào)用
  public function __isset($name)
  {
    echo $name;
    echo '__isset called'.PHP_EOL;
    return true;
  }
 
  //對不可訪問或不存在的屬性進行unset時被調(diào)用
  public function __unset($name)
  {
    echo $name;
    echo '__unset called'.PHP_EOL;
  }
 
  //serialize時被調(diào)用，當(dāng)你不需要保存大對象的所有數(shù)據(jù)時很有用
  public function __sleep()
  {
    echo '__sleep called'.PHP_EOL;
    return array('var1111111111');
  }
 
  //unserialize時被調(diào)用，可用于做些對象的初始化操作
  public function __wakeup()
  {
    echo '__wakeup called'.PHP_EOL;
    $this->var = 'test after wakeup';
  }
 
  //當(dāng)一個類被轉(zhuǎn)換成字符串時被調(diào)用
  public function __toString()
  {
    return '__toString called'.PHP_EOL;
  }
 
  //進行對象clone時被調(diào)用，用來調(diào)整對象的克隆行為
  public function __clone()
  {
    echo '__clone called'.PHP_EOL;
  }
 
  //當(dāng)以函數(shù)方式調(diào)用對象時被調(diào)用
  public function __invoke()
  {
    echo '__invoke called'.PHP_EOL;
  }
 
  //當(dāng)調(diào)用var_export()導(dǎo)出類時，此靜態(tài)方法被調(diào)用。用__set_state的返回值做為var_export的返回值。
  public static function __set_state($arr)
  {
    return '__set_state called'.PHP_EOL;
  }
 
  //當(dāng)調(diào)用var_dump()打印對象時被調(diào)用（當(dāng)你不想打印所有屬性）適用于PHP5.6版本
  public function __debuginfo($arr)
  {
    echo '__debuginfo called'.PHP_EOL;
    return array(
      'var' => 'test fro __debuginfo'
    );
  }
}
 
$m = new Magic(); //__construct()被調(diào)用
$m->not_exist_property = test; //__set()被調(diào)用
echo $m->not_exist_property;//__get()被調(diào)用
$m->abc(1,2,3); //__call()被調(diào)用
echo isset($m->not_exist_property); //__isset()被調(diào)用，返回bool值
unset($m->not_exist_property); //__unset()被調(diào)用
echo $tmp = serialize($m); //__sleep()被調(diào)用
unserialize($tmp); //__wakeup()被調(diào)用
$m1 = clone $m; //__clone()被調(diào)用，對象默認(rèn)是引用傳遞，使用clone關(guān)鍵詞則可實現(xiàn)對象復(fù)制
$m(); //__invoke()
eval( '$m2 = ' . var_export ( $m , true ) . ';' );var_dump($m2);
var_dump($m);
//最后__destruct()被調(diào)用
 
/*
結(jié)果：
__construct called
not_exist_property-test__set called
not_exist_property__get called
abc-1,2,3__call called
not_exist_property__isset called
1not_exist_property__unset called
__sleep called
O:5:"Magic":1:{s:13:"var1111111111";N;}__wakeup called
__destruct called
__clone called
__invoke called
string(20) "__set_state called
"
class Magic#1 (1) {
 public $var =>
 string(4) "test"
}
__destruct called
__destruct called
 
 
*/