php 匯出對象產生代碼並執行var_export和eval

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var_export($obj,true) 匯出一個合法的php代碼,返回一個字串

eval($str) 執行一個字串代碼

__set_state 當用var_export匯出一個類時,自動調用,必須static

 

<?phpclass Person{private $name;private $age;public function __construct($name,$age){$this->name = $name;$this->age = $age;}static function __set_state($arr){$p = new Person($arr[‘name‘],$arr[‘age‘]);$p->name = "ls";$p->age = 20;return $p;}function __toString(){return $this->name."{$this->age}";}}$a = new Person("zs",10);echo $a;echo ‘<br>‘;$str = var_export($a,true);eval(‘$b=‘.$str.‘;‘);echo $b;

  

php 匯出對象產生代碼並執行var_export和eval

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