Error function not invoked in AJAX using Jquery

Question

 $("#submit").click(function(){
    $.ajax({
       type: "POST",
       url: "session.php",
       data: "name=John123&location=Boston",
       success: function(a, msg2){
          $('#feedback').removeClass().addClass('success').text(a +' '+msg2).fadeIn('slow');

       },

         error: function(a, b, c){
              $('#feedback').removeClass().addClass('error').text('This is' +b).fadeIn('slow');
           },

I'm trying to invoke error function using the following code in PHP:

if ($_POST['name'] != "John") {
        $message['error'] = true;
        $message['message'] = "Hmm, please enter a subject in the subject field.";

        echo json_encode($message);
}
else
{
    echo $_POST['name'];
}

But I'm always getting success function invoked. Is there any way i can get error function invoked.

SLaks · Accepted Answer · 2011-05-22 12:30:09Z

2

You need to set the HTTP status code to 500 (or anything else >= 400) to indicate that there was an error.

answered May 22, 2011 at 12:30

SLaks

891k182 gold badges1.9k silver badges2k bronze badges

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

1 Comment

fawad Over a year ago

Thanks. But tell me how should i set this code in PHP so that it returns error and invoke the error function.

Cokegod · Accepted Answer · 2011-05-22 12:29:57Z

1

Why won't you do something like this:

$("#submit").click(function(){
    $.ajax({
        type: "POST",
        url: "session.php",
        data: "name=John&location=Boston",
        success: function(a, msg2){
            if(a.error) {
                $('#feedback').removeClass().addClass('error').text('This is' +a.message).fadeIn('slow');
            }
            else {
                $('#feedback').removeClass().addClass('success').text(a.name +' '+msg2).fadeIn('slow');
            }
        }
    });
});

And:

if ($_POST['name'] != "John") {
    $message['error'] = true;
    $message['message'] = "Hmm, please enter a subject in the subject field.";
}
else
{
    $message['error'] = false;
    $message['name'] = $_POST['name'];
}
echo json_encode($message);

The error function is invoked only when the ajax fails, so instead you can check if the ajax returned that the error exists or not.

answered May 22, 2011 at 12:29

Cokegod

8,44410 gold badges33 silver badges47 bronze badges

1 Comment

fawad Over a year ago

Yes i can do that and it is just the alternative way. But you know what if i get any error while validating the data the error message will be parsed through "success" function, which I feel is not a good programming practice.

Collectives™ on Stack Overflow

Error function not invoked in AJAX using Jquery

2 Answers 2

1 Comment

1 Comment

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

1 Comment

1 Comment

Your Answer

Sign up or log in

Post as a guest

Linked

Related