php - 在CodeIgniter中检索JSON POST数据

我一直在尝试从我的php文件中检索json数据，这让我很难。
代码在我看来：

var productDetails = {'id':ISBNNumber,'qty':finalqty,'price':finalprice,'name':bookTitle};

        var base_url = '<?php echo site_url() ?>';
        $.ajax({
            url: "<?php echo base_url() ?>index.php/user/Add_to_cart/addProductsToCart",
            type: 'POST',
            data:productDetails,
            dataType:'JSON',
        });

尝试在我的控制器中检索：

echo $this->input->post("productDetails");

没有输出。
以下是我的标题：

Remote Address:[::1]:80
Request URL:http://localhost/CI/index.php/user/Add_to_cart/addProductsToCart
Request Method:POST
Status Code:200 OK
Request Headersview source
Accept:application/json, text/javascript, */*; q=0.01
Accept-Encoding:gzip, deflate
Accept-Language:en-US,en;q=0.8,fr;q=0.6
Connection:keep-alive
Content-Length:52
Content-Type:application/x-www-form-urlencoded; charset=UTF-8
Cookie:ci_session=3E5SPro57IrJJkjs2feMNlmMrTqEXrTNN8UyEfleeothNnHwNxuCZDSx4a7cJZGjj7fyr2KLpj%2BPNJeGRSzSPVmcFHVEdhSk4D47ziOl4eZcTUAZlQrWa3EYIeQJVWxMpiGZS26MEfbSXNmfel9e8TcsJTreZHipvfisrJovbXEAW4Uv%2BwrJRep1KCi1MMaDCVJb9UEinRVcDtYe%2F86jhn7kOj4kraVmVzx%2FsOaO0rAxLyAUtez%2Feaa4zBwpN3Td153sAoIb3WxVHoEj2oKyH5prVHigbIhIBR6XZqjBkM6hjBuoD2OSZ2wgLbp9DEENMoqui4WYyHROBuS2DYiJajblcS0KiFga5k%2FQOODvE7p6n%2BozN5ciDliVjJ4PnJ5PD1GaPEmec5%2FbQSlOHYWZk%2F2Blzw3Nw0EtLL7wKDzzQY%3Df645c36bb3548eb8de915b73f8763d97a47783ce
Host:localhost
Origin:http://localhost
Referer:http://localhost/CI/index.php/user/view_available_books/viewAvailableBooks/5
User-Agent:Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/40.0.2214.111 Safari/537.36
X-Requested-With:XMLHttpRequest
**Form Dataview** sourceview URL encoded
id:234
qty:1
price:0.00
name:dasdadsd2q3e!@!@@

我在开发人员工具中看到的响应：

    Array
(
    [id] => 234
    [qty] => 1
    [price] => 0.00
    [name] => dasdadsd2q3e!@!@@
)

但在浏览器中，输出什么都不是。我试图解决这个问题已经4个多小时了，但是没有成功。

print_r($_POST); // outputs nothing
echo $data = file_get_contents('php://input'); //outputs nothing
echo $id    = $this->input->post('productDetails');// outputs nothing

我的视图代码：

<script>
    $('#addtoCart').on('click',function(event){
        event.preventDefault();
        $(this).attr('disabled',"disabled");
        finalprice = $.trim($('#price').val());
        finalqty = $.trim($('#quantity').val());

        var productDetails = JSON.stringify({'id':ISBNNumber,'qty':finalqty,'price':finalprice,'name':bookTitle});

        var base_url = '<?php echo site_url() ?>';
        // console.log($);
        $.ajax({
            url: "<?php echo base_url() ?>index.php/user/Add_to_cart/addProductsToCart",
            type: 'POST',
            contentType: "application/json; charset=utf-8",
            data:productDetails,
            dataType:'html',
        });


    });
</script>

控制器代码：

function addProductsToCart(){
        var_dump(json_decode(file_get_contents("php://input")));
        print_r($_POST);
        // $data = json_decode($_POST["productDetails"]);
        // var_dump($data);
        // echo $data = file_get_contents('php://input');
// print_r(json_decode($data));
        // $id    = $this->input->post('id');
        // $qty   = $this

    }

最佳答案

我在ci中用于ajax调用的常规方法：
JS：

post_array =
{
    "myvar" : "value1",
    "myvar2": "value2"
}

$.post(baseUrl + "/AjaxController/my_function", post_array,
    function(data)
    {
        var res = jQuery.parseJSON(data);
        alert(res.property);
    }

控制器：

public function my_function()
{
    $myvar = $this->input->post('myvar');
    $myvar2 = $this->input->post('myvar2');

    //Stuff

    echo json_encode($myobject);
}