序列化php中的布尔整数显示

Question

为什么我保存序列化数据后它给我一个布尔输出我输入的结果是b:1?下面是我数据库中保存的数据。

a:2:{s:30:"features_safety_number_airbags";b:1;s:29:"features_safety_trans_control";b:1;}

这是插入代码。

if(isset($_POST['submit'])){

        $add_item_features = array(
            "features_safety_number_airbags" => isset($_POST['safety_airbags']),
            "features_safety_trans_control" => isset($_POST['safety_traction']),
            );

        $add_item_features_serialize = serialize($add_item_features);

        $sql = "INSERT INTO item_newcar_temp(`item_features`) VALUES ('".$add_item_features_serialize."')";

Answer 1

这是因为您实际上将数组值设置为 isset() 函数的返回值，这是一个布尔值。

var_dump(isset($a)); // will return boolean(true/false)

你想要的是一个Ternary Operator，看起来像这样：

$add_item_features = array(
    "features_safety_number_airbags" => ((isset($_POST['safety_airbags'])) ? $_POST['safety_airbags'] : 'it wasnt set..'),
    "features_safety_trans_control" => ((isset($_POST['safety_traction'])) ? $_POST['safety_traction'] : 'it wasnt set..'),
);

这将返回一个类似于以下内容的序列化项目：

a:2:{s:30:"features_safety_number_airbags";s:14:"it wasnt set..";s:29:"features_safety_trans_control";s:14:"it wasnt set..";}

Demo/Example