How to receive JSON object in PHP?

Question

I'm trying to send a JSON object from an AJAX request to my server.

I'm doing this with JQuery like this:

  $.ajax({
    type: "POST",
    url: settings.ajax.post,
    dataType: 'json',
    data: basket.aggregate(Basket.EXPORT_JSON, qty),
    success: function(data, textStatus, jqXHR) {
      if (typeof settings.ajax.success == "function") settings.ajax.success(data, textStatus, jqXHR);
    },
    error: function(jqXHR, text, e) {
      if (typeof settings.ajax.error == "function") settings.ajax.error(jqXHR, text, e);
    }
  });

The url is pointed to this file on the server:

<?php

$to = "<my-email-address>";
$subject = "JSON test";
$message = "POST dump:\n\n";

foreach($_POST as $key=>$value)
    {
        $message .= $key . ":" . $value;
    }

mail ($to, $subject, $message);

exit;
?>

But the POST var seems to be empty, even though in Firebug I can see that the correct data was sent to the server:

Firebug can see the JSON Object

After each request is sent, the ajax error function is called, with an undefined error (I guess because there was no reply from the server? Or I don't know?)

You can send data using .load. I thought that if ajax isn't working, then maybe load would work ? — uınbɐɥs
– uınbɐɥs, Commented Jul 19, 2012 at 23:37

Sarke · Accepted Answer · 2012-07-19 23:35:03Z

6

POST needs key value pairs, but you're just sending it one value (a JSON string) without a key. It needs to be an array.

Secondly, you need to decode the JSON before you can use it in PHP as an array or object. json_decode() is used for that.

answered Jul 19, 2012 at 23:35

Sarke

3,3252 gold badges21 silver badges32 bronze badges

Sign up to request clarification or add additional context in comments.

10 Comments

Bergi Over a year ago

Sure, he forgot parameters. But still, FF sent a string, can't that be accessed in PHP somehow?

Ozzy Over a year ago

@Bergi well, I don't think its worth answering that, I just changed the data param to data: {json:basket.aggregate(...)} and I got the JSON string now :)

ernie Over a year ago

@Bergi - for the record, as he only submitted a string, it was treated as the key of the key-value pair. He could have accessed it by examining the array array_keys($_POST), which would have contained the string (in an array with any other POST keys).

Amit Over a year ago

@Ozzy The error in callback is presumably because the script is not sending any headers, which are evaluated as premature exit for a valid HTTP response.

Amit Over a year ago

or you can simply set the header to 200 ok precisely speaking. header('HTTP/1.1 200 OK')

|

Collectives™ on Stack Overflow

How to receive JSON object in PHP?

1 Answer 1

10 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

10 Comments

Your Answer

Sign up or log in

Post as a guest

Related