Check if user exist in facebook

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I want to begin to use the facebook API

i searched for this and i could find it and begin my first program using it

i created an application on facebook and make a windows application program that access this application and get data about me(the owner of the application)

but this is not what i want

i want to call the facebook api at login page and send here an e-mail and password and check if the login data right and login or the user exist but the password is wrong or the username is not exist

and i want to know how can i access the details of a user if i can login with his username and password

Posted 1-Jan-12 21:45pm

amertarekt

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Om Prakash Pant · Answer 1 · 2012-01-01T21:57:00

Solution 1

You can use facebook connect to allow login using facebook.

see the following KB articles:

Getting Started with Facebook Desktop (Client) Applications, C#, WPF / XAML and JSON[^]

Developing Facebook Connect Application using ASP.NET[^]

Posted 1-Jan-12 21:57pm

Om Prakash Pant

Comments

amertarekt 2-Jan-12 4:21am

for the second i want to for c# windows application or WPF not for asp

i have just read the first article before you sent it but at first the code didnot work with me i have an error, this error appear when the login page appear and text is written " you can close this page now"

can you send me a sample way to make what i want?

Eduardo Hernandez Arenas · Answer 2 · 2012-05-10T09:52:00

PHP

/** 
 * @package Check if user exist in twitter
 * @copyright Eduardo Hernandez Arenas (eduardorha@gmail.com)
 * @version 1.0
**/
ini_set('display_errors','Off');
$account = $_GET['user'];

set_time_limit(0);
/*GET CONTENT BY FACEBOOK GRAPH*/
$search = json_decode(file_get_contents("https://graph.facebook.com/{$account}"));

if($search->id)
{
	echo "yes";
}
else 
{
	echo "no";		
}