$.ajax POST Undefined index

Question

Apologies in advance for any mistakes. This is my first post on StackOverflow.

So basically I have a php function. Inside it is a jQuery click function with a variable, into which I'm saving the clicked element's text. I'm trying to send that variable's value to my Uredi.php file, via $.ajax function, to save it into a php variable. However, I'm getting an "Undefined index" error. Help would be greatly appreciated. Thank you.

Here's the code:

PHP function:

public function uredi()
{
?>
<script>
$('.edit').click(function(){

$('.naslov_edit').val($(this).text());
$('#on_top').hide();
var refId = $(this).text();
    $.ajax({
        url: 'uredi.php', 
        type: "POST",
        data: {id: refId},
        success: function(data){
            alert(data);
        }
    }); 

});
</script>
<?php
}

Uredi.php:

<?php
include 'Funkcije.php';

$uredi = new urejanje();
$uredi->uredi();

$id = $_POST['id'];
echo $id;
?>

Funkcije.php is the file with the uredi() function.

EDIT: Thank you everyone for helping. I figured out the problem. Turns out I just had to clean up my code a bit.

since you are getting alert in success, problem should be with server side. — Anoop Joshi P, Mar 13 '14 at 13:24
Alert is returning the HTML code of Uredi.php. Also, full error is Undefined index: id in ... on line 36. — NoStupidQuestions, Mar 13 '14 at 13:34
The undefined index is on line 36 of the PHP code being returned, in other words $_POST['id'] is undefined. — Jay Blanchard, Mar 13 '14 at 13:37
Your file structure seems to be very strange. Could you properly label the filenames for your functions and HTML? Also, please see this answer for an ideal AJAX setup: http://stackoverflow.com/questions/20150130/ajax-and-php-to-enter-multiple-forms-input-to-database/20150474#20150474 — MonkeyZeus, Mar 13 '14 at 14:11

score 0 · Answer 1 · answered Mar 13 '14 at 13:26

0

Why are you assigning $(this).text() to var id and then not using it in the $.ajax()? Remember scope and what doe $(this) actually reference within the $ajax()? I would also shy away from naming variables "id" Try:

var refId = $(this).text();
$.ajax({
    url: 'uredi.php', 
    type: "POST",
    //dataType: 'json',
    data: {id: refId},
    success: function(data){
        alert(data);
    }
});

answered Mar 13 '14 at 13:26

Charles Harmon

380
2
10

Oops. Thank you, I forgot to change that bit. I renamed my variable and used it in the $.ajax. It's still returning Undefined index error though. – NoStupidQuestions Mar 13 '14 at 13:30
If it's a PHP error, do a echo '
```
';
    print_r($_POST);
    echo '
```
';
– Charles Harmon Mar 13 '14 at 13:56
What is that supposed to return? – NoStupidQuestions Mar 13 '14 at 14:02
If you're getting an undefined index error, you need to see if "id" is actually coming through to the $_POST array. That way, you eliminate any javascript ajax problems and that the data is being passed correctly first. Then, you can narrow down where the error is coming from. – Charles Harmon Mar 13 '14 at 14:03
It returned an undefined index error, so I suppose it's javascript/ajax that are causing the problem – NoStupidQuestions Mar 13 '14 at 14:06
Did you try print_r($_POST) and not print_r($_POST['id'])? If you did just the post it would come back with undefined error not index error if you weren't posting. What I want you to look at is everyting that the POST array has in it - may be that the structure of the data is not correct - may be $_POST[0]['id'] or something. – Charles Harmon Mar 13 '14 at 18:01

score 0 · Answer 2 · answered Mar 13 '14 at 13:37

0

Use this;

$.ajax({
    url: 'uredi.php', 
    type: "POST",
    data: "id=" + refId,
    success: function(data){
        alert(data);
    }
});

answered Mar 13 '14 at 13:37

Hüseyin BABAL

15,400
4
51
73

Could you please put your ajax response on your question as edit? – Hüseyin BABAL Mar 13 '14 at 13:45
The alert inside the ajax function returns the whole HTML of uredi.php. Is that what you meant? – NoStupidQuestions Mar 13 '14 at 13:49
But, you have specified datatype json in your ajax, and you are returning html in your php side. Do not use html code in your php file. Probably, there is error message also belong to html code in alert message – Hüseyin BABAL Mar 13 '14 at 14:06
Sorry, that should be inside a comment. I'll remove it – NoStupidQuestions Mar 13 '14 at 14:09
I suggest you to remove all check your code above $_POST["id"], they are causing problem – Hüseyin BABAL Mar 13 '14 at 14:10

score 0 · Answer 3 · answered Mar 13 '14 at 13:40

0

perhaps you meant to read the post vars before initializing the class and maybe even pass Id in?

  $id = $_POST['id'];
  $uredi = new urejanje();
  $uredi->uredi($id);

In any case I think You'll need to show us whats inside Funkcije.php

answered Mar 13 '14 at 13:40

andrew

9,313
7
30
61

The function uredi() that I posted is inside Funkcije.php – NoStupidQuestions Mar 13 '14 at 13:43
which is why we need to see the rest of the file as the faulty code may be in the file – andrew Mar 13 '14 at 13:47
I tried moving the function to uredi.php and it's still returning the error, so I guess that's not it – NoStupidQuestions Mar 13 '14 at 13:55

$.ajax POST Undefined index

3 Answers3