PHP - Filtered反序列化

PHP 7引入了Filtered unserialize()函数，以在对不受信任的数据上的对象进行反序列化时提供更好的安全性。

<?php
   class MyClass1 { 
      public $obj1prop;   
   }
   class MyClass2 {
      public $obj2prop;
   }

   $obj1=new MyClass1();
   $obj1->obj1prop=1;
   $obj2=new MyClass2();
   $obj2->obj2prop=2;

   $serializedObj1=serialize($obj1);
   $serializedObj2=serialize($obj2);

   //default behaviour that accepts all classes
   //second argument can be ommited.
   //if allowed_classes is passed as false, unserialize converts all objects into __PHP_Incomplete_Class object
   $data=unserialize($serializedObj1 , ["allowed_classes" => true]);

   //converts all objects into __PHP_Incomplete_Class object except those of MyClass1 and MyClass2
   $data2=unserialize($serializedObj2 , ["allowed_classes" => ["MyClass1", "MyClass2"]]);

   print($data->obj1prop);
   print("<br/>");
   print($data2->obj2prop);
?>

它产生以下浏览器输出-

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