Reference Guide

facebook FBML Reference Guide Page 83 of 159

Message/Wall attachments

Fb:attachment-preview

Description

Renders a link in a wall or message attachment that, when clicked, replaces that attachment with newly fetched

content. The URL from which the content is fetched is a hidden input in the current content, and all other inputs

in the content are posted.

This article or section needs expansion

Attributes

Examples

This is a basic outline of how to setup attachments.

Basically, set the Attachment callback URL to some page on your server. For instance

http://yourserver.com/attach.php

attach.php will handle both the attachments, and the selection of the attachments.

<?php

if ($_POST['message_sent'] < 1)

{

// The user is selecting the attachment, in other words, preview mode

// Print out form elements that allow the user to select the attachment

echo '<fb:editor-text label="Sample" name="sample" value="'

. htmlspecialchars($_POST['sample']) . '"/>';

// The following line tells facebook to use the same script for attachments

echo '<input type="hidden" name="url" value="http://yourserver.com/attach.php" />';

// The following line lets your user preview the attachment they've selected

echo "<fb:attachment-preview>Click here to preview attachment</fb:attachment-preview> ";

echo "Preview:";

echo "<hr />";

}

else

{

// Do anything here you want to do for attached objects only

echo "(The object is attached) ";

}

// Display your attachment here. This will show up both for preview and live attachments

echo "you wrote " . htmlspecialchars($_POST['sample']) . " ";