source: extensions/oAuth/include/test/examples/hello_world/index.php @ 20293

<?php
        session_start(); 

        // config and includes
        $config = dirname(__FILE__) . '/../../hybridauth/config.php';
    require_once( "../../hybridauth/Hybrid/Auth.php" );

        try{
                // hybridauth EP
                $hybridauth = new Hybrid_Auth( $config );

                // automatically try to login with Twitter
                $twitter = $hybridauth->authenticate( "Twitter" );

                // return TRUE or False <= generally will be used to check if the user is connected to twitter before getting user profile, posting stuffs, etc..
                $is_user_logged_in = $twitter->isUserConnected();

                // get the user profile 
                $user_profile = $twitter->getUserProfile();

                // access user profile data
                echo "Ohai there! U are connected with: <b>{$twitter->id}</b><br />";
                echo "As: <b>{$user_profile->displayName}</b><br />";
                echo "And your provider user identifier is: <b>{$user_profile->identifier}</b><br />";  

                // or even inspect it
                echo "<pre>" . print_r( $user_profile, true ) . "</pre><br />";

                // uncomment the line below to get user friends list
                // $twitter->getUserContacts();

                // uncomment the line below to post something to twitter if you want to
                // $twitter->setUserStatus( "Hello world!" );

                // ex. on how to access the twitter api with hybridauth
                //     Returns the current count of friends, followers, updates (statuses) and favorites of the authenticating user.
                //     https://dev.twitter.com/docs/api/1/get/account/totals
                $account_totals = $twitter->api()->get( 'account/totals.json' );

                // print recived stats 
                echo "Here some of yours stats on Twitter:<br /><pre>" . print_r( $account_totals, true ) . "</pre>";

                // logout
                echo "Logging out.."; 
                $twitter->logout(); 
        }
        catch( Exception $e ){  
                // In case we have errors 6 or 7, then we have to use Hybrid_Provider_Adapter::logout() to 
                // let hybridauth forget all about the user so we can try to authenticate again.

                // Display the recived error, 
                // to know more please refer to Exceptions handling section on the userguide
                switch( $e->getCode() ){ 
                        case 0 : echo "Unspecified error."; break;
                        case 1 : echo "Hybridauth configuration error."; break;
                        case 2 : echo "Provider not properly configured."; break;
                        case 3 : echo "Unknown or disabled provider."; break;
                        case 4 : echo "Missing provider application credentials."; break;
                        case 5 : echo "Authentication failed. " 
                                          . "The user has canceled the authentication or the provider refused the connection."; 
                                   break;
                        case 6 : echo "User profile request failed. Most likely the user is not connected "
                                          . "to the provider and he should to authenticate again."; 
                                   $twitter->logout();
                                   break;
                        case 7 : echo "User not connected to the provider."; 
                                   $twitter->logout();
                                   break;
                        case 8 : echo "Provider does not support this feature."; break;
                } 

                // well, basically your should not display this to the end user, just give him a hint and move on..
                echo "<br /><br /><b>Original error message:</b> " . $e->getMessage();

                echo "<hr /><h3>Trace</h3> <pre>" . $e->getTraceAsString() . "</pre>"; 

                /*
                        // If you want to get the previous exception - PHP 5.3.0+ 
                        // http://www.php.net/manual/en/language.exceptions.extending.php
                        if ( $e->getPrevious() ) {
                                echo "<h4>Previous exception</h4> " . $e->getPrevious()->getMessage() . "<pre>" . $e->getPrevious()->getTraceAsString() . "</pre>";
                        }
                */
        }