jQuery AJAX调用（POST到PHP）问题

Question

I need to use the $.ajax() call within jQuery to post a little bit of JSON to my PHP script.

I have tried everything but nothing works as I would like it to. I simply try to echo a var_dump of the $_POST/$_GET arrays but it comes back empty.

var myJSONObject = {"bindings": [{"conversation": _conid} ]};
var obj = $.toJSON(myJSONObject);

$.ajax({
    type: "POST",
    url: "./code/ajax/fetch_messages.php",
    data: obj,
    async:true,
    contentType: "application/json; charset=utf-8",
    dataType: "json",
    success: function(data) 
    {
    },
    error: function (XMLHttpRequest, textStatus, errorThrown) 
    {
    },
    beforeSend: function (XMLHttpRequest) 
    {

    },
    complete: function (XMLHttpRequest, textStatus) 
    {
  }});

I can see that the post is made by looking in the headers:

{"bindings":[{"conversation":"38x001c61450ad4d5abd47c37408e8236eb5427f54e2930000306882646e4016c5f8ecf8e00a18a26ab3b6d07f6727bd187625daaedf951f93072d54d59e300e100"}]}

PHP:

echo var_dump($_POST);

Everything works great when using the $.post() call but I always run in to problems when I try to switch to $.ajax. I need to use it to be able to retreive the response UTF-8 encoded.

The code pasted in this post is just one of many snippets I've tried, even examples from tutorials on the web does not work.

Could someone please give me a snippet that you know do work so I can try that? Sending JSON through POST.

Answer 1

I think you must give your json string a key, so you can get it on the other side (PHP):

data: {"myjson": obj},

Then on PHP it will be in $_POST['myjson']