unserialize()过滤机制

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<?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); 

// 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]); 

//转换为所有对象到 __PHP_Incomplete_Class 对象，除了 MyClass1 和 MyClass2 

$data2 = unserialize($serializedObj2 , ["allowed_classes" => ["MyClass1", "MyClass2"]]); 

print($data->obj1prop); 

print(PHP_EOL); 

print($data2->obj2prop); 

?>