Facebook canvas app - invite friends - facebook

Question

I'm writing a Facebook iframe/canvas app and would like to give users the ability to invite friends to install this app. Currently I am using Facebook's PHP-SDK for logging in the users and all interaction with Facebook. The only things I can find about implementing the invite friends dialog either relate to FBML, which has bee deprecated; or the requests dialog: https://developers.facebook.com/docs/reference/dialogs/requests/ . The latter seems to require the use of Facebook's Javascript SDK, which has its own methods for login.
Is the JS SDK my only option, and if so, how can I use this without forcing my users to have to login again?

Answer 1

first approach:
function newInvite(){
var receiverUserIds = FB.ui({
method : 'apprequests',
message: 'Come on man checkout my applications.',
},
function(receiverUserIds) {
console.log("IDS : " + receiverUserIds.request_ids);
}
);
//http://developers.facebook.com/docs/reference/dialogs/requests/
}
Second Approach:
<?php
include_once "fbmain.php";
if (isset($_REQUEST['ids'])){
echo "Invitation Successfully Sent";
echo '<pre>';
print_r($_REQUEST);
echo '</pre>';
echo "<b>If you need to save these user ids then save these to database <br />then redirect user to the apps.facebook.com/yourapp url</b>";
$string = "<script type='text/javascript'>top.location.href='{$fbconfig['appBaseUrl']}'; </script>";
echo "Use the following javascript code to redirect user <br />";
echo htmlentities($string, ENT_QUOTES);
}
else {
?>
<fb:serverFbml style="width: 500px;">
<script type="text/fbml">
<fb:fbml>
<fb:request-form
action="<?=$fbconfig['baseUrl']?>/invite.php"
target="_top"
method="POST"
invite="true"
type="Demo Application Learning API"
content="Checkout this demo application and learn iframe base facebook application development. <fb:req-choice url='<?=$fbconfig['appBaseUrl']?>' label='Accept' />"
>
<fb:multi-friend-selector
showborder="false"
actiontext="Checkout this demo application">
</fb:request-form>
</fb:fbml>
</script>
</fb:serverFbml>
<?php } ?>
third approach(using PHP-SDK):
$app_id = "YOUR_APP_ID";
$canvas_page = "YOUR_CANVAS_PAGE_URL";
$message = "Would you like to join me in this great app?";
$requests_url = "http://www.facebook.com/dialog/apprequests?app_id="
. $app_id . "&redirect_uri=" . urlencode($canvas_page)
. "&message=" . $message;
if (empty($_REQUEST["request_ids"])) {
echo("<script> top.location.href='" . $requests_url . "'</script>");
} else {
echo "Request Ids: ";
print_r($_REQUEST["request_ids"]);
}
?>

Answer 2

Yes - currently the FB JS requests dialog is the only way. And your users won't need to authenticate with your app - in fact they won't need to authenticate with it all. I have a jsfiddle example with code you can look at, but all you need to specify is your app id.

Answer 3

currently (as of v2.3) there is no way for canvas app's that are not games to invite users.
Can non-game app use FB apprequests dialog in FB v2