Passing data to server using JSON in Codeigniter

问题

I'm trying to pass some data which is stored in Javascript array to the server for database processings. I'm using codeignier.

Javascript Array (unitdata_set):-

[{"unit_id":"13","unit_title":"Testsdsdf","unit_max_occupancy":"3","unit_no":"1","unit_no_adults":"1","unit_no_children":"1","unit_no_extrabed":0,"unit_mealtype":"Full Board","unit_fullboard_adult":"6000.00","unit_fullboard_child":"4000.00","unit_halfboard_adult":"1800.00","unit_halfboard_child":"1200.00","room_total":"81600.00","all_room_price":"81600.00","extra_bed_price":"4.00","meal_price":22000,"saving_amount":16320,"discounted_bedroom_price":65280},{"unit_id":"14","unit_title":"Res2","unit_max_occupancy":"12","unit_no":"0","unit_no_adults":"0","unit_no_children":"0","unit_no_extrabed":0,"unit_mealtype":"Bed and Breakfast","unit_fullboard_adult":"9000.00","unit_fullboard_child":"7000.00","unit_halfboard_adult":"7000.00","unit_halfboard_child":"5000.00","room_total":"86400.00","all_room_price":"0.00","extra_bed_price":"","meal_price":0,"saving_amount":0,"discounted_bedroom_price":0}]

Ajax Function:-

  function sendBooking(){

          var boooking_url = "<?php echo site_url('tempbooking/addBooking'); ?>";
          var data_booking = '';
          data_booking = JSON.stringify(unitdata_set);

          $.post(boooking_url,{

            'booking_data[]':data_booking

          },function(data){
            console.log(data);

          });

      }

My Controller function which is used to receive the json data:-

function addBooking(){
            $booking_data=$this->input->post('booking_data');

             foreach ($booking_data as $booking) {

                             $booking_attr = json_decode($booking);
                        echo $booking_attr->unit_id . " " . $booking_attr->unit_title;
                        //echo $booking_attr['unit_id'] . " " . $booking_attr['unit_title'];
                }


        }

The error message that i get:-

<h4>A PHP Error was encountered</h4>

<p>Severity: Notice</p>
<p>Message:  Trying to get property of non-object</p>
<p>Filename: controllers/tempbooking.php</p>
<p>Line Number: 156</p>

</div><div style="border:1px solid #990000;padding-left:20px;margin:0 0 10px 0;">

<h4>A PHP Error was encountered</h4>

<p>Severity: Notice</p>
<p>Message:  Trying to get property of non-object</p>
<p>Filename: controllers/tempbooking.php</p>
<p>Line Number: 156</p>

</div>

Print_r :-

print_r($this->input->post('booking_data'));

Array
(
    [0] => [{"unit_id":"13","unit_title":"Testsdsdf","unit_max_occupancy":"3","unit_no":"1","unit_no_adults":"1","unit_no_children":"1","unit_no_extrabed":0,"unit_mealtype":"Full Board","unit_fullboard_adult":"6000.00","unit_fullboard_child":"4000.00","unit_halfboard_adult":"1800.00","unit_halfboard_child":"1200.00","room_total":"81600.00","all_room_price":"81600.00","extra_bed_price":"4.00","meal_price":22000,"saving_amount":16320,"discounted_bedroom_price":65280},{"unit_id":"14","unit_title":"Res2","unit_max_occupancy":"12","unit_no":"0","unit_no_adults":"0","unit_no_children":"0","unit_no_extrabed":0,"unit_mealtype":"Bed and Breakfast","unit_fullboard_adult":"9000.00","unit_fullboard_child":"7000.00","unit_halfboard_adult":"7000.00","unit_halfboard_child":"5000.00","room_total":"86400.00","all_room_price":"0.00","extra_bed_price":"","meal_price":0,"saving_amount":0,"discounted_bedroom_price":0}]
)

回答1:

Try to change your controller

function addBooking()
{
    $booking_data=json_decode($this->input->post('booking_data'));
    foreach ($booking_data as $booking) 
    {   
        $booking_attr = ($booking);
        echo $booking_attr->unit_id . " " . $booking_attr->unit_title;
        //echo $booking_attr['unit_id'] . " " . $booking_attr['unit_title'];
    }
}

And change your javascript code like this

function sendBooking()
{
      var boooking_url = "<?php echo site_url('tempbooking/addBooking'); ?>";
      var data_booking = '';
      data_booking = (unitdata_set);

      $.post(boooking_url,{

        'booking_data':data_booking

      },function(data){
        console.log(data);

      });

  }

回答2:

Maybe it's because your JSON object is in an array ?

[ {JSON} ]

Try to modify your php function so you access the JSON in your array:

function addBooking(){
    $booking_data=$this->input->post('booking_data');

    foreach ($booking_data as $booking) {
        //NEW:
        $booking_attr = json_decode($booking[0]);

        echo $booking_attr->unit_id . " " . $booking_attr->unit_title;
    }
}

回答3:

For some reason json_decode does not decode arrays which contains objects. If you are using javascript array to pass it to server-side / php please add your array to an object first. Follow below steps to get this done.

Please add your array to an object. As follows:-

var unitdata_set = [];

var obj_userbooking_data = {"bookings":unitdata_set}; //Added the above array into a new object and passed it to the server

Make sure to JSON.stringify the object.

data_booking = JSON.stringify(obj_userbooking_data);

So the function becomes

function sendBooking(){


                    var boooking_url = "<?php echo site_url('booking/addBooking'); ?>";
                    var data_booking = '';
                    data_booking = JSON.stringify(obj_userbooking_data);

                    $.post(boooking_url,{

                      'booking_data':data_booking

                    },function(data){
                          console.log(data);

                    });



              }

use json_decode to decode the object which is converted into JSON string, using JSON.stringify in the client side. Thus, your server-side / php / Codeigniter Controller function becomes:-

    function addBooking(){
         $booking_data=$this->input->post('booking_data');
         $booking_data=json_decode($booking_data,true); 
         echo 'Your Data: ' . $booking_data[0]['unit_id'];
 }

来源：https://stackoverflow.com/questions/27324121/passing-data-to-server-using-json-in-codeigniter

标签

javascript

php

json

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