Question

Currently I am working on a ajax-based web application that does some XHR.

I chose CakePHP + jQuery to do the jobs, they work pretty well except this little problem.

Say, I make a String of a valid JSON form ==> { “test” : “hello world”}

Then I am calling jQuery’s ajax method to send it to the destination php page:

jQuery.ajax
    ({
        type: 'POST',
        cache: false,
        async: false,
        timeout: 10000,
        url : 'http://localhost/method/',
        dataType : 'json',  //defines expected response datatype
        contentType : 'application/json', //defines request datatype
        data : { "test" : "hello world"},
        success : function(json)
        {
           //do some stuff here.
        }});

Previously I tried this ajax function with empty data (i.e. just use data : {} since this is a POST), and it worked just fine; however, now that I’ve added a json-formatted data to the HTTP POST, is there a way to refer to it from the PHP script’s side?

I tried : data : { "data" : {"test" : "helloworld"}}

I use PHP’s isset[$_POST[‘data’] to check, and the result is POST variable ‘data’ is unset.

Can anyone give me a way to solve this problem? Many thanks in advance!!!

Answer 1

This may be what you are after (from http://www.factsandpeople.com/facts-mainmenu-5/26-html-and-javascript/89-jquery-ajax-json-and-php):

$(document).ready(function(){ 
  var data = 
  { 
    "sales": [ 
      { "firstname" : "John", "lastname" : "Brown" },
      { "firstname" : "Marc", "lastname" : "Johnson" }
    ] // end of sales array
  }
  var dataString = JSON.stringify(data);
  $.post('simpleformSubmit.php', { data: dataString}, showResult, "text");
});

The PHP script (Post data contains a json structure):

<?php
  $logFile = 'logFile';
  $res = json_decode(stripslashes($_POST['data']), true);

  echo "sales1_lastname: ".$res['sales'][1]['lastname'];
?>