Question

我从knockout.js生成了一个Json并创建了这样的东西：

{"po":"11446019431405","orders":[{"product":{"ID":"2","product_name":"A","product_code":""},"ID":"2","product_name":"A","product_code":"","price":"11","qty":1,"discount":0,"subtotal":11,"amount":11},{"product":{"ID":"1","product_name":"B","product_code":""},"ID":"1","product_name":"B","product_code":"","price":"10","qty":1,"discount":0,"subtotal":"10","amount":10}],"grandTotal":21}

我从Yii尝试了json_decode和Json :: decode，但它没有用。什么地方出了错？有没有一种特殊的方法可以在PHP中解析它？

以下是我的参考代码。

我的Javascript代码：

$.post(url, ko.toJSON(orderCollection), {}, "json");

在我的PHP代码中我尝试了$ _POST和Yii :: $ app-＆gt; request-＆gt; post（）并且都失败了

public function actionPostorders() {
        $request = Yii::$app->request->post();
        echo Json::decode($request);
    }

使用Json :: decode时出现错误：

PHP Warning 'yii\base\ErrorException' with message 'json_decode() expects parameter 1 to be string, array given' 

in C:\xampp\yii2\controllers\PurchaseController.php:121

使用vanilla PHP时会出现类似的错误

json_decode($_POST)

PHP Warning 'yii\base\ErrorException' with message 'json_decode() expects parameter 1 to be string, array given' 

in C:\xampp\yii2\controllers\PurchaseController.php:121

这是我在vardump我的$ _POST

时得到的

array(1) { ["{"po":"11446021195934","orders":"]=> array(1) { ["{"product":{"ID":"2","product_name":"A","product_code":""},"ID":"2","product_name":"A","product_code":"","price":"11","qty":1,"discount":0,"subtotal":11,"amount":11},{"product":{"ID":"1","product_name":"B","product_code":""},"ID":"1","product_name":"B","product_code":"","price":"10","qty":1,"discount":0,"subtotal":"10","amount":10}"]=> string(0) "" } }

Answer 1

您的问题是$_POST是一个数组，您确实想要

json_decode($_POST[0]);

仅解码后期数组中的第一个对象。

然而，你很快就会注意到这也不会起作用; $_POST数组要求您传入键值json对象或数组。在你的情况下，你确实传递了一个json对象，但它变得奇怪，因为你没有通过一个键。我并不完全确定这一点，但根据你的var_dump ed数组的外观，我确定问题是你没有在数组中传递它。我还想指出，如果你设置了正确的标题并且只是传递了对象，那么后端应该能够读取它，就像它读取form-data

一样容易

Answer 2

根据JSLint

，您的JSON是正确的

{
    "po":"11446019431405",
    "orders":
    [
        {
            "product":
            {
                "ID":"2","product_name":"A",
                "product_code":""
            },
            "ID":"2",
            "product_name":"A",
            "product_code":"",
            "price":"11","qty":1,
            "discount":0,
            "subtotal":11,
            "amount":11
        },
        {
            "product":
            {
                "ID":"1","product_name":"B",
                "product_code":""
            },
            "ID":"1",
            "product_name":"B",
            "product_code":"",
            "price":"10",
            "qty":1,
            "discount":0,
            "subtotal":"10",
            "amount":10
        }
    ],
        "grandTotal":21
}

压缩：

{"po":"11446019431405","orders":[{"product":{"ID":"2","product_name":"A","product_code":""},"ID":"2","product_name":"A","product_code":"","price":"11","qty":1,"discount":0,"subtotal":11,"amount":11},{"product":{"ID":"1","product_name":"B","product_code":""},"ID":"1","product_name":"B","product_code":"","price":"10","qty":1,"discount":0,"subtotal":"10","amount":10}],"grandTotal":21}

用JSLint运行这个压缩的，没有出错。因此，处理JSON可能会出错。

Answer 3

我不知道Json :: decode正在做什么，但是使用标准的php它应该返回一个对象，所以你不能回显对象或数组，尝试print_r或var_dump这样的变量。

$json = '{"po":"11446019431405","orders":[{"product":{"ID":"2","product_name":"A","product_code":""},"ID":"2","product_name":"A","product_code":"","price":"11","qty":1,"discount":0,"subtotal":11,"amount":11},{"product":{"ID":"1","product_name":"B","product_code":""},"ID":"1","product_name":"B","product_code":"","price":"10","qty":1,"discount":0,"subtotal":"10","amount":10}],"grandTotal":21}';

print_r( json_decode($json));

结果

stdClass Object
(
    [po] => 11446019431405
    [orders] => Array
        (
            [0] => stdClass Object
                (
                    [product] => stdClass Object
                        (
                            [ID] => 2
                            [product_name] => A
                            [product_code] => 
                        )

                    [ID] => 2
                    [product_name] => A
                    [product_code] => 
                    [price] => 11
                    [qty] => 1
                    [discount] => 0
                    [subtotal] => 11
                    [amount] => 11
                )

            [1] => stdClass Object
                (
                    [product] => stdClass Object
                        (
                            [ID] => 1
                            [product_name] => B
                            [product_code] => 
                        )

                    [ID] => 1
                    [product_name] => B
                    [product_code] => 
                    [price] => 10
                    [qty] => 1
                    [discount] => 0
                    [subtotal] => 10
                    [amount] => 10
                )

        )

    [grandTotal] => 21
)

Answer 4

你能试试这段代码吗？

 $request = Yii::$app->request->post();
 $jsondecode = CJSON::decode($request, true);
 print_r($jsondecode);

无效的JSON数据PHP

4 个答案: