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    <p>Here it is the doc:</p> <ul> <li><a href="https://developers.facebook.com/docs/reference/dialogs/" rel="nofollow">https://developers.facebook.com/docs/reference/dialogs/</a></li> <li><a href="https://developers.facebook.com/docs/reference/dialogs/requests/" rel="nofollow">https://developers.facebook.com/docs/reference/dialogs/requests/</a></li> </ul> <p>You can either do that by using the JavaScript SDK, or the Graph API.</p> <p>To use the graph api, you can build an URL like this:</p> <pre><code>https://www.facebook.com/dialog/apprequests ?app_id=&lt;your-app-id&gt; &amp;redirect_uri=http://www.example.com/response/ &amp;message=Your%20message%20here &amp;display=popup </code></pre> <p>By specifying different values for "display", you can choose how to display the selector. Can be page, popup, iframe, touch, or wap.</p> <p>When the user clicks the "send request" button, gets redirected to "redirect_uri" with shome get appended (I wasn't able to find the exact name for the get parameter, but it would be easy to find out).</p> <h2>UPDATE:</h2> <p>After the user clicks on "Send request", he gets redirected to:</p> <pre><code>&lt;redirect_uri&gt;?request_ids[0]=XXXX&amp;request_ids[1]=YYYY&amp;request_ids[2]=ZZZZ#_=_ </code></pre> <p>So, in PHP, you'll find a list of ids of selected friends in <code>$_GET['request_ids']</code>. You can use that list to publish something on friends wall, by using the Graph API.</p> <p><strong>Side note:</strong> must have the same domain you specified as your site URL in the app configuration page.</p> <h2>UPDATE:</h2> <p>An improvement to your PHP code:</p> <pre><code>if (isset($_GET['request_ids'])) { for ($i=0; $i&lt;count(request_ids); $i++){ $link = ($link + "&amp;to=" + $request_ids[$i]); } echo "&lt;script language=javascript&gt;parent.location=''&lt;/script&gt;"; } </code></pre> <p>Then, what's inside <code>$link</code>? To publish on one's wall, you should use the appropriate Graph API request, directly from the script you specified in <code>redirect_uri</code>.</p>
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    1. POHow to display the friends selector dialog with PHP sdk for Facebook?
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    1. COThank you for the URL, it is what I was looking for. Do you know how I can post something to the selected friends? It is posting nothing after clicked on the "Send Request" button.
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    2. COI updated the answer to include the "after-button-click" thing
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    3. COThank you. I tried to use the request_ids with PHP, but I don't think I've implemented it correctly. Please see my update. Actually, I use a JS script to send the URL after an "onclick" button. Should I also use a JS function to get the request_ids?
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