PHP 过滤 unserialize()

<?php 
class MyClass1 {  
   public $obj1prop;    
} 
class MyClass2 { 
   public $obj2prop; 
} 
 
 
$obj1 = new MyClass1(,NULL); 
$obj1->obj1prop = 1; 
$obj2 = new MyClass2(,NULL); 
$obj2->obj2prop = 2; 
 
$serializedObj1 = serialize($obj1,NULL); 
$serializedObj2 = serialize($obj2,NULL); 
 
// 默认行为是接收所有类 
// 第二个参数可以忽略 
// 如果 allowed_classes 设置为 false, unserialize 会将所有对象转换为 __PHP_Incomplete_Class 对象 
$data = unserialize($serializedObj1 , ["allowed_classes" => true],NULL); 
 
// 转换所有对象到 __PHP_Incomplete_Class 对象，只允许 MyClass1 和 MyClass2 转换到 __PHP_Incomplete_Class 
$data2 = unserialize($serializedObj2 , ["allowed_classes" => ["MyClass1", "MyClass2"]],NULL); 
 
print($data->obj1prop,NULL); 
print(PHP_EOL,NULL); 
print($data2->obj2prop,NULL); 
?>