Getting multiple values returned from a $.ajax POST

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开发者_运维知识库 

});

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.

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.

Easiest way would be to use JSON...

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

});

function callback(data, status)
{
  // $("div").text(data);
  if(data.error){
    alert(error.message||'Unknown Error');
  } else {
     $("div.numbert").text(data.access||'No value');
     $("div.numbert2").text(data.emailList||'No value');
  }

}

PHP:

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

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


// Give access - function returns data to variable
$responseData['access'] = GiveAccess($user);


// Email - function returns data to variable
$responseData['emailList'] = emailAdmins($user);    

    } else {

$responseData['error'] = array('code' => 403, 'message' => "Sorry you do not have access");
    }

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

No, just return a JSON object or a dataset that's delimited that you can parse.

You can return your values using json:

$storage = array();
 if ($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);
$storage['value'] = $value;

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

    } else {

$message = "Sorry you do not have access";
$storage['message'] = $message;
    }

header("Content-Type: application/json; charset=utf8"); $return = json_encode($storage); echo $return; exit;

You can then iterate over the object and go

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