Question

I would like to send data using $.ajax like this:

$.ajax({'url': 'my.php',
        'type': 'POST',
        'data': arr,
        'success': function(response) {
                      alert(response);
                   }
});

The problem is that arr is an associative array that looks like:

arr['description_0'] = 'very nice picture!';
arr['tags_0'] = 'David "Nice Picture" 2010';
arr['description_1'] = 'In the pool';
arr['tags_1'] = '"April 2010" Australia';
    .                    .
    .                    .
    .                    .

If my.php looks like:

<?php
echo count($_POST);
?>

The response is 0.

But, if I change

'data': arr,

to

'data': 'a=chess&b=checkers',

the response is 2, as expected.

What should I convert arr to so that the data will be sent properly ?

Answer 1

if you’re really having problems on that, try reading $.param().

---

also, I’ve discovered, how did you initialize your arr variable?

you should initialize it as var arr = {}; then pass it as 'data': arr,. Try to look at firebug or webket’s dev tools to see what data are being posted to the server.