IE8 does not properly execute AJAX call to PHP file

Question

IE8 does not properly execute AJAX call to PHP file

It's strange, it works perfectly fine in Firefox.

This is the JavaScript code I'm using:

star.updateRating=function(v, listid) { 
xmlHttp=GetXmlHttpObject();
if (xmlHttp==null) {
    alert("Looks like AJAX isn't supported by your browser!");
    return;
}  
var randomnbr = randomID(12); 
var cacheid = randomnbr+"_"+listid;              
var url="http://mywebsiteurl.com/includes/functions_rating.php";                 
    url=url+"?action=ratelist";                      
    url=url+"&listid="+listid;                   
    url=url+"&rating="+v;    
    url=url+"&cid="+cacheid;      
// disable the container 
$('starMsg').innerHTML=' - Thanks for rating!';
$('star').setAttribute('onmousemove','');
$('star').setAttribute('onmousedown','');

xmlHttp.open("POST",url,true);
xmlHttp.send(null);

}

At the beginning of my PHP file, I have: header ("content-type: text/xml");

Despite the JavaScript running completely (I even have an alert(1); at the end), the PHP script fails to update the database when called from Internet Explorer.

Any suggestions on what might be causing this issue?

javascript ajax internet-explorer-8

Answer 1

Answer №1

Have you considered utilizing a tool such as jquery to address the variations in different browsers?

Answer 2

Have you considered utilizing a tool such as jquery to address the variations in different browsers?

Answer 3

Answer №2

To ensure compatibility with both Internet Explorer and Firefox, use the following code to get the Object correctly:

function GetXmlHttpObject()
{
  if (window.XMLHttpRequest)
  {
    // code for IE7+, Firefox, Chrome, Opera, Safari
    return new XMLHttpRequest();
  }

  if (window.ActiveXObject)
  {
    // code for IE6, IE5
    return new ActiveXObject("Microsoft.XMLHTTP");
  }

  return null;
}

Then, call the function like this:

xmlhttp=GetXmlHttpObject();

It is worth noting that you may actually be retrieving the object correctly, although you have not provided details of your GetXmlHttpObject() function. If you are using xmlhttp.send(null) with the POST method, ensure that you are not sending an empty request to the server. Either include the variables to be sent in .send(), or switch to the GET method and append the variables to the URL.

Answer 4

To ensure compatibility with both Internet Explorer and Firefox, use the following code to get the Object correctly:

function GetXmlHttpObject()
{
  if (window.XMLHttpRequest)
  {
    // code for IE7+, Firefox, Chrome, Opera, Safari
    return new XMLHttpRequest();
  }

  if (window.ActiveXObject)
  {
    // code for IE6, IE5
    return new ActiveXObject("Microsoft.XMLHTTP");
  }

  return null;
}

Then, call the function like this:

xmlhttp=GetXmlHttpObject();

It is worth noting that you may actually be retrieving the object correctly, although you have not provided details of your GetXmlHttpObject() function. If you are using xmlhttp.send(null) with the POST method, ensure that you are not sending an empty request to the server. Either include the variables to be sent in .send(), or switch to the GET method and append the variables to the URL.

Answer 5

Answer №3

xmlHttp.open("POST",url,true);
xmlHttp.send(null);

send(null) may be causing the issue at hand.

To rectify this, consider using send('') to send an empty body or simply omit the parameter altogether (send()). The XMLHttpRequest interface does not specify including a null parameter.

Typically, for a POST request, it is customary to send the form-encoded (a=b&x=y) string as the request body instead of including it in the query string.

Given that adding a rating is a state-changing action, it is recommended to use POST rather than GET.

Answer 6

xmlHttp.open("POST",url,true);
xmlHttp.send(null);

send(null) may be causing the issue at hand.

To rectify this, consider using send('') to send an empty body or simply omit the parameter altogether (send()). The XMLHttpRequest interface does not specify including a null parameter.

Typically, for a POST request, it is customary to send the form-encoded (a=b&x=y) string as the request body instead of including it in the query string.

Given that adding a rating is a state-changing action, it is recommended to use POST rather than GET.

Answer 7

Answer №4

What is the process for initializing your XMLHTTPRequest object? Keep in mind that separate methods are required for IE and Firefox.

Answer 8

What is the process for initializing your XMLHTTPRequest object? Keep in mind that separate methods are required for IE and Firefox.

Answer 9

Answer №5

Oops, I ran into an issue in my PHP file. Turns out I was using a different user in Internet Explorer compared to Firefox, which is why I didn't notice it right away. Interestingly, there were actually two problems at play here, and one of them was resolved by switching back to using the GET method. (I had switched to POST initially based on advice from other questions regarding IE ajax issues).

Answer 10

Oops, I ran into an issue in my PHP file. Turns out I was using a different user in Internet Explorer compared to Firefox, which is why I didn't notice it right away. Interestingly, there were actually two problems at play here, and one of them was resolved by switching back to using the GET method. (I had switched to POST initially based on advice from other questions regarding IE ajax issues).

IE8 does not properly execute AJAX call to PHP file

Answer №1

Answer №2

Answer №3

Answer №4

Answer №5

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