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                <?php  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                class Jetpack_Keyring_Service_Helper { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	/**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 * @var Jetpack_Keyring_Service_Helper  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 **/  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	private static $instance = null;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	static function init() { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		if ( is_null( self::$instance ) ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			self::$instance = new Jetpack_Keyring_Service_Helper;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		return self::$instance;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	}  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                	private function __construct() { | 
            
            
                                                                        
                            
            
                                    
            
            
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                		add_action( 'load-settings_page_sharing', array( __CLASS__, 'admin_page_load' ), 9 );  | 
            
            
                                                                        
                            
            
                                    
            
            
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                	}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	/**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 * Gets a URL to the public-api actions. Works like WP's admin_url  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 * @param string $service Shortname of a specific service.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 * @return URL to specific public-api process  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	// on WordPress.com this is/calls Keyring::admin_url  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	static function api_url( $service = false, $params = array() ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		/**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		 * Filters the API URL used to interact with WordPress.com.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		 * @since 2.0.0  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		 * @param string https://public-api.wordpress.com/connect/?jetpack=publicize Default Publicize API URL.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$url = apply_filters( 'publicize_api_url', 'https://public-api.wordpress.com/connect/?jetpack=publicize' );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		if ( $service ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			$url = add_query_arg( array( 'service' => $service ), $url );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		if ( count( $params ) ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			$url = add_query_arg( $params, $url );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		return $url;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                View Code Duplication | 
                	static function connect_url( $service_name ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		return add_query_arg( array(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			'action'   => 'request',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			'service'  => $service_name,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			'kr_nonce' => wp_create_nonce( 'keyring-request' ),  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			'nonce'    => wp_create_nonce( "keyring-request-$service_name" ),  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		), menu_page_url( 'sharing', false ) );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	static function refresh_url( $service_name ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		return add_query_arg( array(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			'action'   => 'request',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			'service'  => $service_name,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			'kr_nonce' => wp_create_nonce( 'keyring-request' ),  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			'refresh'  => 1,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			'for'      => 'publicize',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			'nonce'    => wp_create_nonce( "keyring-request-$service_name" ),  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		), admin_url( 'options-general.php?page=sharing' ) );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                View Code Duplication | 
                	static function disconnect_url( $service_name, $id ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		return add_query_arg( array(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			'action'   => 'delete',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			'service'  => $service_name,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			'id'       => $id,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			'kr_nonce' => wp_create_nonce( 'keyring-request' ),  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			'nonce'    => wp_create_nonce( "keyring-request-$service_name" ),  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		), menu_page_url( 'sharing', false ) );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	static function admin_page_load() { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		if ( isset( $_GET['action'] ) ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			if ( isset( $_GET['service'] ) ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				$service_name = $_GET['service'];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			switch ( $_GET['action'] ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				case 'request':  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                					check_admin_referer( 'keyring-request', 'kr_nonce' );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                					check_admin_referer( "keyring-request-$service_name", 'nonce' );  | 
            
                            
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                					$verification = Jetpack::generate_secrets( 'publicize' );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                					if ( ! $verification ) { | 
            
                            
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                						$url = Jetpack::admin_url( 'jetpack#/settings' );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                						wp_die( sprintf( __( "Jetpack is not connected. Please connect Jetpack by visiting <a href='%s'>Settings</a>.", 'jetpack' ), $url ) );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                					}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                					$stats_options = get_option( 'stats_options' );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                					$wpcom_blog_id = Jetpack_Options::get_option( 'id' );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                					$wpcom_blog_id = ! empty( $wpcom_blog_id ) ? $wpcom_blog_id : $stats_options['blog_id'];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                					$user     = wp_get_current_user();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                					$redirect = Jetpack_Keyring_Service_Helper::api_url( $service_name, urlencode_deep( array(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                						'action'       => 'request',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                						'redirect_uri' => add_query_arg( array( 'action' => 'done' ), menu_page_url( 'sharing', false ) ),  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                						'for'          => 'publicize',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                						// required flag that says this connection is intended for publicize  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                						'siteurl'      => site_url(),  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                						'state'        => $user->ID,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                						'blog_id'      => $wpcom_blog_id,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                						'secret_1'     => $verification['secret_1'],  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                						'secret_2'     => $verification['secret_2'],  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                						'eol'          => $verification['exp'],  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                					) ) );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                					wp_redirect( $redirect );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                					exit;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                					break;  | 
            
                            
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                				case 'completed':  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    120
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                					Jetpack::load_xml_rpc_client();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                					$xml = new Jetpack_IXR_Client();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                					$xml->query( 'jetpack.fetchPublicizeConnections' );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    124
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                					if ( ! $xml->isError() ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    125
                 | 
                                    
                                                     | 
                
                 | 
                						$response = $xml->getResponse();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    126
                 | 
                                    
                                                     | 
                
                 | 
                						Jetpack_Options::update_option( 'publicize_connections', $response );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    127
                 | 
                                    
                                                     | 
                
                 | 
                					}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    128
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    129
                 | 
                                    
                                                     | 
                
                 | 
                					break;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    130
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    131
                 | 
                                    
                                                     | 
                
                 | 
                				case 'delete':  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    132
                 | 
                                    
                                                     | 
                
                 | 
                					$id = $_GET['id'];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    133
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    134
                 | 
                                    
                                                     | 
                
                 | 
                					check_admin_referer( 'keyring-request', 'kr_nonce' );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    135
                 | 
                                    
                                                     | 
                
                 | 
                					check_admin_referer( "keyring-request-$service_name", 'nonce' );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    136
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    137
                 | 
                                    
                                                     | 
                
                 | 
                					Jetpack_Keyring_Service_Helper::disconnect( $service_name, $id );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    138
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    139
                 | 
                                    
                                                     | 
                
                 | 
                					do_action( 'connection_disconnected', $service_name );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    140
                 | 
                                    
                                                     | 
                
                 | 
                					break;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    141
                 | 
                                    
                                                     | 
                
                 | 
                			}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    142
                 | 
                                    
                                                     | 
                
                 | 
                		}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    143
                 | 
                                    
                                                     | 
                
                 | 
                	}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    144
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    145
                 | 
                                    
                                                     | 
                
                 | 
                	/**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    146
                 | 
                                    
                                                     | 
                
                 | 
                	 * Remove a Publicize connection  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    147
                 | 
                                    
                                                     | 
                
                 | 
                	 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    148
                 | 
                                    
                                                     | 
                
                 | 
                	static function disconnect( $service_name, $connection_id, $_blog_id = false, $_user_id = false, $force_delete = false ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    149
                 | 
                                    
                                                     | 
                
                 | 
                		Jetpack::load_xml_rpc_client();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    150
                 | 
                                    
                                                     | 
                
                 | 
                		$xml = new Jetpack_IXR_Client();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    151
                 | 
                                    
                                                     | 
                
                 | 
                		$xml->query( 'jetpack.deletePublicizeConnection', $connection_id );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    152
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    153
                 | 
                                    
                                                     | 
                
                 | 
                		if ( ! $xml->isError() ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    154
                 | 
                                    
                                                     | 
                
                 | 
                			Jetpack_Options::update_option( 'publicize_connections', $xml->getResponse() );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    155
                 | 
                                    
                                                     | 
                
                 | 
                		} else { | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    156
                 | 
                                    
                                                     | 
                
                 | 
                			return false;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    157
                 | 
                                    
                                                     | 
                
                 | 
                		}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    158
                 | 
                                    
                                                     | 
                
                 | 
                	}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    159
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
                | 
                    160
                 | 
                                    
                                                     | 
                
                 | 
                }  | 
            
            
                                                        
            
                                    
            
            
                | 
                    161
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                        
If you define a variable conditionally, it can happen that it is not defined for all execution paths.
Let’s take a look at an example:
In the above example, the variable $x is defined if you pass “foo” or “bar” as argument for $a. However, since the switch statement has no default case statement, if you pass any other value, the variable $x would be undefined.
Available Fixes
Check for existence of the variable explicitly:
Define a default value for the variable:
Add a value for the missing path: