[development] AJAX return values

[Robert Douglass]

Use drupal_to_js on the server and parseJson on the client to transfer 
serialized data in the server->client direction. I also like to send 
serialized JS to the server, but this requires external JSON libraries 
(both client and server side).

-Robert


Dan Robinson wrote:
> I am trying to get some AJAX stuff to work -
>
> javascript function -
>
> function setMapContacts(uri, groupname) {
>      HTTPGet(uri+"/"+groupname, addContactsToMap, "") ;
> }
>
> this is the PHP function that gets called as a result of the above HTTPGet -
>
> function getContacts($GroupName) {
>   $contacts = getContactsInGroup($GroupName);
>   print drupal_to_js($contacts);
>   exit();
> }
>
>
> Here is the callback .js function  I don't think I understand the
> correct way to format the callback - "contacts" has no value -
>
> function addContactsToMap(httpresponse, xmlhttp, contacts) {
>   if (xmlhttp.status != 200) {
>     return alert('An HTTP error '+ xmlhttp.status +' occured.\n'+
> httpresponse.uri);   
>   }  ;
>     map.clearOverlays();
>     alert(httpresponse);
> }
>
> and I get a dump in httpresponse - the dump has the data i want in it -
> but I would much rather be dealing with a javascript array :).  How do I
> get a javascript array?  Is there a cast I have to do? 
>
> Thanks,
>
> Dan
>
>