PHP 7 介绍了过滤 unserialize() 函数在对不可信数据进行反序列化时提供更好的安全性。它可以防止可能的代码注入,并使开发人员能够将可以非序列化的类列入白名单。
<?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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