Facebook Apps - How to check permission to read user email address using Graph API

---

First you need to have PHP SDK to start with. You can download the PHP SDK for facebook at the following location:

https://github.com/facebook/php-sdk

Here is the source code that checks and gets to access the email address through Graph API:

    
    include_once 'facebook.php';

	$facebook = new Facebook(array(
		'appId' => 'YOUR_APP_ID',
		'secret' => 'YOUR_SECRET_KEY',
		'cookie' => true,
		'domain' => 'www.softwareandfinance.com'
	));

	$app_name = "Broadcast to Friends";
	$app_url = "http://apps.facebook.com/your_app_name/";

	$user_id = $facebook->getUser();

	if (!$user_id) {	
		$url = $facebook->getLoginUrl(array(
		'canvas' => 1,
		'fbconnect' => 0
		
		));

	} else 
	{
		try {
			$permissions = $facebook->api("/me/permissions");	
            if(! array_key_exists('email', $permissions['data'][0]) ) {				
                header( "Location: " . $facebook->getLoginUrl(array(
                        "scope" => "email",
                )) );
            }
            $uid = $facebook->getUser();
            $me = $facebook->api('/me?fields=name,email');
            echo "Hello " . $me['name'] . "
" . $me['email'] . "
";    
		} 
		catch (FacebookApiException $e) 
		{
			echo "Error: Unable to read email address";

		}
	}