<?php

class A
{

  public $publicName = " public name";
  private $privateName = " private name";
  protected $protectedName = " protected name";

  //类初始化的时候执行
  public function __construct()
  {
    var_dump("__construct:" . time());
  }

  //调用类的属性不存在 或者 非公有属性的时候会执行
  public function __get($name)
  {
    var_dump("__get:" . time() . " name:" . $name);
  }

  //设置类的属性不存在 或者 非公有属性的时候会执行
  public function __set($name, $value)
  {
    var_dump("__set:" . time() . " name:" . $name . ',value:' . $value);
  }

  //判断类的属性是否存在 若name对应的属性不存在 或者非公有属性时会执行
  public function __isset($name)
  {
    var_dump("__isset:" . time() . " name:" . $name);
  }

  //删除类的属性是否存在 若name对应的属性不存在 或者非公有属性时会执行
  public function __unset($name)
  {
    var_dump("__unset:" . time() . " name:" . $name);
  }

  //序列化对象的时候触发
  public function __sleep()
  {
    var_dump("__sleep:" . time());
    return ['publicName'];
  }

  //反序列化对象的时候触发
  public function __wakeup()
  {
    var_dump("__wakeup:" . time());
  }

  //克隆函数的时候触发 可以在这里防止克隆
  public function __clone()
  {
    var_dump("__clone:" . time());
  }

  //对象转字符串输出
  public function __toString()
  {
    var_dump("__toString:" . time());
    return "";//必须返回string
  }

  //调试信息 这里对打印的 类信息进行加工
  public function __debugInfo()
  {
    return ['publicName' => $this->publicName . ' hang'];
  }

  //把类当做函数一样使用时调用时触发
  public function __invoke()
  {
    var_dump("__invoke:" . time());
  }

  //调用类不存在的方法时候执行
  public function __call($name, $arguments)
  {
    //此类必须要2个参数 第一个参数是函数名 第二个参数是请求值对应的是调用函数时传递进来的参数
    var_dump("__call:" . time() . ' name:' . $name . ',arguments:' . json_encode($arguments));
  }

  //调用类不存在的静态方法时候执行
  static public function __callStatic($name, $arguments)
  {
    var_dump("__callStatic:" . time() . ' name:' . $name . ',arguments:' . json_encode($arguments));
  }

  //类执行完的时候执行
  public function __destruct()
  {
    var_dump("__destruct:" . time());
  }
}

$obj = new A();
/**
 * string(22) "__construct:1572225812"
 * string(21) "__destruct:1572225812"
 */

$obj->noFunction();
/**
 * string(46) "__call:1572225930 name:noFunction,arguments:[]"
 */

$obj::noStaticFunction(1);
/**
 * string(59) "__callStatic:1572226262 name:noStaticFunction,arguments:[1]"
 */

$obj->publicName;
$obj->privateName;
$obj->protectedName;
$obj->publicA;
/**
 * string(33) "__get:1572226958 name:privateName"
 * string(35) "__get:1572226958 name:protectedName"
 * string(35) "__get:1572226958 name:publicA"
 */

$obj->publicName = "long";
//var_dump("console log :set value -> publicName = ".$obj->publicName);
$obj->privateName   = "long";
$obj->protectedName = "long";
$obj->publicA       = "long";
/**
 * string(44) "__set:1572227494 name:privateName,value:long"
 * string(46) "__set:1572227494 name:protectedName,value:long"
 * string(40) "__set:1572227494 name:publicA,value:long"
 */

isset($obj->publicName);//bool(true)
isset($obj->privateName);
isset($obj->protectedName);
isset($obj->publicA);
empty($obj->publicB);//empty也会调用 __isset()
/**
 * string(35) "__isset:1572227785 name:privateName"
 * string(37) "__isset:1572227785 name:protectedName"
 * string(31) "__isset:1572227785 name:publicA"
 */

//unset($obj->publicName);
//var_dump($obj->publicName);//删除类的属性之后再调用会触发 __get()
unset($obj->privateName);
unset($obj->protectedName);
unset($obj->publicB);
/**
 * string(35) "__unset:1572228345 name:privateName"
 * string(37) "__unset:1572228345 name:protectedName"
 * string(31) "__unset:1572228345 name:publicB"
 */

$serialize_value = serialize($obj);
//O:1:"A":1:{s:10:"publicName";s:4:"long";}
/**
 * string(18) "__sleep:1572229299"
 */

$obj2 = unserialize($serialize_value);
/**
 * string(19) "__wakeup:1572230195"
 * string(21) "__destruct:1572230958" //这里会多调用一次 析构函数 因为对象obj2
 */

$obj3 = clone $obj;
/**
 * string(18) "__clone:1572231071"
 * string(21) "__destruct:1572231071" //这里会再多调用一次析构函数
 */

echo $obj;
/**
 * string(21) "__toString:1572231328"
 */

//var_dump($obj);
/**
 * 未定义 debugInfo时
 * object(A)#1 (3) {
 *  ["publicName"]=>string(4) "long"
 *  ["privateName":"A":private]=>string(13) " private name"
 *  ["protectedName":protected]=>string(15) " protected name"
 * }
 * 定义 debugInfo后
 * object(A)#1 (1) {
 *  ["publicName"]=>string(9) "long hang"
 * }
 */

$obj(1);
/**
 * string(19) "__invoke:1572232068"
 */