AJAX not posting data to PHP in IE9

[joNathanBriG]

So I have an AJAX call that I'm using to POST 1 variable to a PHP script I have on a separate server. The PHP takes this variable and returns data based off of what the variable is. This works on all browsers except IE9 and below. IE9 returns data but it's an error saying the variable is missing which to me shows that it isn't sending the data. Below I have the AJAX call I'm making:

(function (jQ) {

var inviteID = '00000000000';

jQ.ajax({
url: 'www.example.com/test.php',
type: 'POST',
dataType: 'json',
cache: false,
data: { classID: inviteID },
error: function (data, status, error) {
jQ('.statusField').append('Failure: ' + data + status + error);
},
success: function (data, status, error) {
jQ('.statusField').append('Success: ' + data);
}
});
})(jQuery);

And below I have the PHP script that's being used:

<?php
//first POST to grab token
function runPost($classID) {

$postdata = array(
'username' => 'username',
'password' => 'password'
);
//open connection
$ch = curl_init();

//set the url, POST data
curl_setopt($ch, CURLOPT_URL, "https://www.example.com/login");
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($postdata));
curl_setopt($ch, CURLOPT_USERAGENT, 'example');
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: application/json'));
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

//execute post
$result = curl_exec($ch);

//close connection
curl_close($ch);

list($message, $time, $token, $userID) = split(',', $result);
list($one, $two, $three, $four, $five) = split('\"', $token);
$four = json_encode($four);
$four = str_replace('"','',$four);


$secondaryPostData = array(
'token' => $four,
'data' => array( 'invitationID' => $classID
));

//open connection
$chu = curl_init();

//set the url, POST data
curl_setopt($chu, CURLOPT_URL, "https://www.example.com/classID");
curl_setopt($chu, CURLOPT_POST, 1);
curl_setopt($chu, CURLOPT_POSTFIELDS, json_encode($secondaryPostData));
curl_setopt($chu, CURLOPT_USERAGENT, 'example');
curl_setopt($chu, CURLOPT_HTTPHEADER, array('Content-Type: application/json'));
curl_setopt($chu, CURLOPT_RETURNTRANSFER, 1);

//execute post

$secondResult = curl_exec($chu);

//close connection
curl_close($chu);
return json_encode($secondResult);
}
//Grab classID from javascript
echo runPost(trim($_POST['classID']));
?>

 

 

Again, this works fine in everything except IE. I've tried using just $.post and even XDomainRequest() and get the same result. The network console in IE shows that the Request body does have the classID in it, but I'm guessing it's just not sending the data to the PHP script. I don't know if I'm missing something that IE needs to send this to the PHP script but any help with this would be GREATLY appreciated.

[CroNiX]

What version of jQuery?

[joNathanBriG]

I'm using 1.11.0