Generate Facebook ID Card with PHP

//include facebook SDK
include_once("inc/facebook.php"); 
//New Facebook object with your app id and app secret
$facebook = new Facebook(array(
  'appId'  => $appId,
  'secret' => $appSecret,
));
//get facebook user
$fbuser = $facebook->getUser();
if(!$fbuser) //if user is null
{
	//show login button
}
else
{
	//do stuff like merging image and
}

//copy facebook image to local folder
copy('http://graph.facebook.com/USER_ID/picture?width=100&height=100','Local_folder/USER_ID.jpg');
//merge two images (profile picture on id card image template)
imagecopymerge($dest, $src, 320, 32, 0, 0, 100, 100, 100); 
//write on merged image using a font
imagettftext($dest, 10, 0, 170, 190, 'color' , 'DidactGothic.ttf', 'Text to write');

######### edit details ##########
$appId 				= 'xxxxxxxxxxx'; //Facebook App ID
$appSecret 			= 'xxxxxxxxxxxxxxxxxxxxxxxx'; // Facebook App Secret
$return_url 		= 'http://www.sitename.com/get_fb_id/';  //return url (url to script)
$temp_folder 		= 'tmp/'; //temp dir path to store images
$fbPermissions 		= 'publish_stream,user_hometown,user_birthday';  //Required facebook permissions
$image_id_png		= 'assets/id.png'; // id card image template path
$font 				= 'assets/fonts/DidactGothic.ttf'; //font used
#################################
// make sure curl is enabled and working
if (!in_array  ('curl', get_loaded_extensions())){die('curl required!');} 
//include facebook SDK
include_once("inc/facebook.php"); 
//Facebook API
$facebook = new Facebook(array(
  'appId'  => $appId,
  'secret' => $appSecret,
));
if(isset($_GET["logout"]) && $_GET["logout"]==1)
{
	//Destroy the current session and logout user
	$facebook->destroySession();
	header('Location: '.$return_url);
}
//get currently logged-in Facebook user details
$fbuser = $facebook->getUser();
if(!$fbuser)
{
	//new users get to see this login button
	$loginUrl = $facebook->getLoginUrl(array('scope' => $fbPermissions,'redirect_uri'=>$return_url));
	echo '
<div style="margin:20px;text-align:center;"><a href="'.$loginUrl.'"><img src="assets/facebook-login.png" /></a></div>
';
}
else
{
	 //get user profile
	 try {
		$user_profile = $facebook->api('/me');
		//list of user granted permissions
		$user_permissions = $facebook->api("/me/permissions");
	  } catch (FacebookApiException $e) {
		echo $e;
		$fbuser = null;
	  }
	  //login url
	  $loginUrl = $facebook->getLoginUrl(array('scope' => $fbPermissions,'redirect_uri'=>$return_url)); 
	  // permission required to proceed
	  $permissions_needed = explode(',',$fbPermissions); 
	  //loop thrugh each permission
	  foreach($permissions_needed as $per)
	  {
		//if more permission needed show login link
		if (!array_key_exists($per, $user_permissions['data'][0])) {
			die('
<div>We need additional '.$per.' permission to continue, <a href="'.$loginUrl.'">click here</a>!</div>
');
		}
	  }
	//display logout url
	echo '
<div>'.$user_profile["name"].' [<a href="?logout=1">Log Out</a>]</div>
'; 
        ###### start generating ID ##########
	//copy user profile image from facebook in temp folder
	if(!copy('http://graph.facebook.com/'.$fbuser.'/picture?width=100&height=100',$temp_folder.$fbuser.'.jpg'))
	{
		die('Could not copy image!');
	}
	##### start generating Facebook ID ########
	$dest = imagecreatefrompng($image_id_png); // source id card image template
	$src = imagecreatefromjpeg($temp_folder.$fbuser.'.jpg'); //facebook user image stored in our temp folder
	imagealphablending($dest, false);
	imagesavealpha($dest, true);
	//merge user picture with id card image template
	//need to play with numbers here to get alignment right
	imagecopymerge($dest, $src, 320, 32, 0, 0, 100, 100, 100); 
	//colors we use for font
	$facebook_blue = imagecolorallocate($dest, 81, 103, 147); // Create blue color
	$facebook_grey = imagecolorallocate($dest, 74, 74, 74); // Create grey color
	//Texts to embed into id card image template
	$txt_user_id 		= $fbuser;
	$txt_user_name 		= isset($user_profile['name'])?$user_profile['name']:'No Name';
	$txt_user_gender 	= isset($user_profile['gender'])?$user_profile['gender']:'No gender';
	$txt_user_hometown 	= isset($user_profile['hometown'])?$user_profile['hometown']['name']:'Unknown';
	$txt_user_birth 	= isset($user_profile['birthday'])?$user_profile['birthday']:'00/00/0000';
	$user_text 			= 'Your source for Google+ and hangout graphics for free.';
	$txt_credit 		= 'Generated using www.saaraan.com';
	//format birthday, not showing whole birth date!
	$fb_birthdate = date($txt_user_birth);
	$sort_birthdate = strtotime($fb_birthdate);
	$for_birthdate = date('d M', $sort_birthdate);
	imagealphablending($dest, true); //bring back alpha blending for transperent font
	imagettftext($dest, 10, 0, 170, 190, $facebook_grey , $font, $txt_user_id); //Write user id to id card
	imagettftext($dest, 15, 0, 25, 105, $facebook_grey, $font, $txt_user_name); //Write name to id card
	imagettftext($dest, 15, 0, 25, 147, $facebook_grey, $font, $txt_user_gender); //Write gender to id card
	imagettftext($dest, 15, 0, 170, 147, $facebook_grey, $font, $txt_user_hometown); //Write hometown to id card
	imagettftext($dest, 15, 0, 25, 190, $facebook_grey, $font, $for_birthdate); //Write birthday to id card
	imagettftext($dest, 10, 0, 25, 215, $facebook_grey, $font, $user_text); //Write custom text to id card
	imagettftext($dest, 8, 0, 25, 240, $facebook_blue, $font, $txt_credit); //Write credit link to id card
	imagepng($dest, $temp_folder.'id_'.$fbuser.'.jpg'); //save id card in temp folder
        //now we have generated ID card, we can display it on browser or post it on facebook
	echo '<img src="tmp/id_'.$fbuser.'.jpg" >'; //display saved id card
	/* or output image to browser directly
	header('Content-Type: image/png');
	imagepng($dest);
	*/
	/*  //Post ID card to User Wall
        $post_url = '/'.$fbuser.'/photos';
        //posts message on page statues
        $msg_body = array(
        'source'=>'@'.'tmp/id_'.$fbuser.'.jpg',
        'message' => 'interesting ID';
        );
		$postResult = $facebook->api($post_url, 'post', $msg_body );
	*/
	imagedestroy($dest);
	imagedestroy($src);
}