PHP filter unserialize()
PHP 7 adds a feature that can provide filtering for unserialize(), which can prevent code injection of illegal data and provide safer deserialized data.
Example
<?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);
// 默認(rèn)行為是接收所有類
// 第二個參數(shù)可以忽略
// 如果 allowed_classes 設(shè)置為 false, unserialize 會將所有對象轉(zhuǎn)換為 __PHP_Incomplete_Class 對象
$data = unserialize($serializedObj1 , ["allowed_classes" => true]);
// 轉(zhuǎn)換所有對象到 __PHP_Incomplete_Class 對象，除了 MyClass1 和 MyClass2
$data2 = unserialize($serializedObj2 , ["allowed_classes" => ["MyClass1", "MyClass2"]]);
print($data->obj1prop);
echo "<br/>";
print($data2->obj2prop);
?>The above program execution output result is:
1 2
