Question

I have some ajax code that executes on mouseclick. It calls a file called update.php that does a bunch of stuff, including checking for user permissions, numerous database calls, etc. In the end, I also want to be able to return a few variables from PHP for the callback to use, but not sure how to reference them – or if there’s a better way to return this info.

$.ajax({
type: "POST",
url: "update.php",
data: dataString,
success: callback 

});

function callback(data, status)
{
// $("div").text(data);
$("div.numbert").text("[first variable here]");
$("div.numbert2").text("[second variable here]");
        }

From my update.php file (some snippets):

    if ($check_access > 0)
    {
// Update database 

$sql = "UPDATE db SET access = '1' WHERE user = '$user'";
$result = mysql_query($sql) or die(mysql_error());


// Give access - function returns data to variable
$value = GiveAccess($user);


// Email - function returns data to variable
$emaillist = emailAdmins($user);    

    } else {

$message = "Sorry you do not have access";
    }

So I’d like to figure out how to use the variables $message, $value and $emaillist in my callback if possible.

I’m wondering if I just need to make multiple $.ajax POST calls, with each .php function that returns a variable having it’s own call?

Thanks!

---

—-UPDATE——-

Updated code trying to use the json methods – thanks for all the help – but seems I’m missing one last thing.

    $.ajax({
type: "POST",
url: "update.php",
data: dataString,
dataType: 'json',
    success: callback 

});

function callback(data, status)
{
// $("div").text(data);
$("div.numbert").text(data.value);
$("div.numbert2").text(data.emaillist);

and update.php:

    $storage = array();
// Update database 

$sql = "UPDATE db SET access = '1' WHERE user = '$user'";
$result = mysql_query($sql) or die(mysql_error());


// Give access - function returns data to variable
$storage['value'] = "some user";


// Email - function returns data to variable
    $storage['emaillist'] = "some stuff";   

    header('Content-type: application/json');
    echo json_encode($storage);
    exit(0);    

Thanks again.

Answer 1

You can use a JSON wrapper:

$messages = array();
$messages['value'] = GiveAccess($user);
$messages['emaillist'] = emailAdmins($user);
$messages['message'] = "Sorry you do not have access";

echo json_encode($messages);

And then simply use:

data.value    data.emaillist    data.message 

in your Javascript.