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 * @copyright 2009-2020 John Blackbourn * @license GPL v2 or later * * Plugin Name: User Switching * Description: Instant switching between user accounts in WordPress * Version: 1.5.4 * Plugin URI: https://johnblackbourn.com/wordpress-plugin-user-switching/ * Author: John Blackbourn & contributors * Author URI: https://github.com/johnbillion/user-switching/graphs/contributors * Text Domain: user-switching * Domain Path: /languages/ * Network: true * Requires PHP: 5.3 * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ /** * Main container class for the User Switching plugin. */ class user_switching { /** * The name used to identify the application during a WordPress redirect. * * @var string */ public static $application = 'WordPress/User Switching'; /** * Sets up all the filters and actions. */ public function init_hooks() { // Required functionality: add_filter( 'user_has_cap', array( $this, 'filter_user_has_cap' ), 10, 4 ); add_filter( 'map_meta_cap', array( $this, 'filter_map_meta_cap' ), 10, 4 ); add_filter( 'user_row_actions', array( $this, 'filter_user_row_actions' ), 10, 2 ); add_action( 'plugins_loaded', array( $this, 'action_plugins_loaded' ), 1 ); add_action( 'init', array( $this, 'action_init' ) ); add_action( 'all_admin_notices', array( $this, 'action_admin_notices' ), 1 ); add_action( 'wp_logout', 'user_switching_clear_olduser_cookie' ); add_action( 'wp_login', 'user_switching_clear_olduser_cookie' ); // Nice-to-haves: add_filter( 'ms_user_row_actions', array( $this, 'filter_user_row_actions' ), 10, 2 ); add_filter( 'login_message', array( $this, 'filter_login_message' ), 1 ); add_filter( 'removable_query_args', array( $this, 'filter_removable_query_args' ) ); add_action( 'wp_meta', array( $this, 'action_wp_meta' ) ); add_action( 'wp_footer', array( $this, 'action_wp_footer' ) ); add_action( 'personal_options', array( $this, 'action_personal_options' ) ); add_action( 'admin_bar_menu', array( $this, 'action_admin_bar_menu' ), 11 ); add_action( 'bp_member_header_actions', array( $this, 'action_bp_button' ), 11 ); add_action( 'bp_directory_members_actions', array( $this, 'action_bp_button' ), 11 ); add_action( 'bbp_template_after_user_details', array( $this, 'action_bbpress_button' ) ); add_action( 'switch_to_user', array( $this, 'forget_woocommerce_session' ) ); add_action( 'switch_back_user', array( $this, 'forget_woocommerce_session' ) ); } /** * Defines the names of the cookies used by User Switching. */ public function action_plugins_loaded() { // User Switching's auth_cookie if ( ! defined( 'USER_SWITCHING_COOKIE' ) ) { define( 'USER_SWITCHING_COOKIE', 'wordpress_user_sw_' . COOKIEHASH ); } // User Switching's secure_auth_cookie if ( ! defined( 'USER_SWITCHING_SECURE_COOKIE' ) ) { define( 'USER_SWITCHING_SECURE_COOKIE', 'wordpress_user_sw_secure_' . COOKIEHASH ); } // User Switching's logged_in_cookie if ( ! defined( 'USER_SWITCHING_OLDUSER_COOKIE' ) ) { define( 'USER_SWITCHING_OLDUSER_COOKIE', 'wordpress_user_sw_olduser_' . COOKIEHASH ); } } /** * Outputs the 'Switch To' link on the user editing screen if the current user has permission to switch to them. * * @param WP_User $user User object for this screen. */ public function action_personal_options( WP_User $user ) { $link = self::maybe_switch_url( $user ); if ( ! $link ) { return; } ?> $cookie_life ); } /** * Loads localisation files and routes actions depending on the 'action' query var. */ public function action_init() { load_plugin_textdomain( 'user-switching', false, dirname( plugin_basename( __FILE__ ) ) . '/languages' ); if ( ! isset( $_REQUEST['action'] ) ) { return; } $current_user = ( is_user_logged_in() ) ? wp_get_current_user() : null; switch ( $_REQUEST['action'] ) { // We're attempting to switch to another user: case 'switch_to_user': if ( isset( $_REQUEST['user_id'] ) ) { $user_id = absint( $_REQUEST['user_id'] ); } else { $user_id = 0; } // Check authentication: if ( ! current_user_can( 'switch_to_user', $user_id ) ) { wp_die( esc_html__( 'Could not switch users.', 'user-switching' ), 403 ); } // Check intent: check_admin_referer( "switch_to_user_{$user_id}" ); // Switch user: $user = switch_to_user( $user_id, self::remember() ); if ( $user ) { $redirect_to = self::get_redirect( $user, $current_user ); // Redirect to the dashboard or the home URL depending on capabilities: $args = array( 'user_switched' => 'true', ); if ( $redirect_to ) { wp_safe_redirect( add_query_arg( $args, $redirect_to ), 302, self::$application ); } elseif ( ! current_user_can( 'read' ) ) { wp_safe_redirect( add_query_arg( $args, home_url() ), 302, self::$application ); } else { wp_safe_redirect( add_query_arg( $args, admin_url() ), 302, self::$application ); } exit; } else { wp_die( esc_html__( 'Could not switch users.', 'user-switching' ), 404 ); } break; // We're attempting to switch back to the originating user: case 'switch_to_olduser': // Fetch the originating user data: $old_user = self::get_old_user(); if ( ! $old_user ) { wp_die( esc_html__( 'Could not switch users.', 'user-switching' ), 400 ); } // Check authentication: if ( ! self::authenticate_old_user( $old_user ) ) { wp_die( esc_html__( 'Could not switch users.', 'user-switching' ), 403 ); } // Check intent: check_admin_referer( "switch_to_olduser_{$old_user->ID}" ); // Switch user: if ( switch_to_user( $old_user->ID, self::remember(), false ) ) { if ( ! empty( $_REQUEST['interim-login'] ) ) { $GLOBALS['interim_login'] = 'success'; // @codingStandardsIgnoreLine login_header( '', '' ); exit; } $redirect_to = self::get_redirect( $old_user, $current_user ); $args = array( 'user_switched' => 'true', 'switched_back' => 'true', ); if ( $redirect_to ) { wp_safe_redirect( add_query_arg( $args, $redirect_to ), 302, self::$application ); } else { wp_safe_redirect( add_query_arg( $args, admin_url( 'users.php' ) ), 302, self::$application ); } exit; } else { wp_die( esc_html__( 'Could not switch users.', 'user-switching' ), 404 ); } break; // We're attempting to switch off the current user: case 'switch_off': // Check authentication: if ( ! current_user_can( 'switch_off' ) ) { /* Translators: "switch off" means to temporarily log out */ wp_die( esc_html__( 'Could not switch off.', 'user-switching' ) ); } // Check intent: check_admin_referer( "switch_off_{$current_user->ID}" ); // Switch off: if ( switch_off_user() ) { $redirect_to = self::get_redirect( null, $current_user ); $args = array( 'switched_off' => 'true', ); if ( $redirect_to ) { wp_safe_redirect( add_query_arg( $args, $redirect_to ), 302, self::$application ); } else { wp_safe_redirect( add_query_arg( $args, home_url() ), 302, self::$application ); } exit; } else { /* Translators: "switch off" means to temporarily log out */ wp_die( esc_html__( 'Could not switch off.', 'user-switching' ) ); } break; } } /** * Fetches the URL to redirect to for a given user (used after switching). * * @param WP_User $new_user Optional. The new user's WP_User object. * @param WP_User $old_user Optional. The old user's WP_User object. * @return string The URL to redirect to. */ protected static function get_redirect( WP_User $new_user = null, WP_User $old_user = null ) { if ( ! empty( $_REQUEST['redirect_to'] ) ) { $redirect_to = self::remove_query_args( wp_unslash( $_REQUEST['redirect_to'] ) ); $requested_redirect_to = wp_unslash( $_REQUEST['redirect_to'] ); } else { $redirect_to = ''; $requested_redirect_to = ''; } if ( ! $new_user ) { /** This filter is documented in wp-login.php */ $redirect_to = apply_filters( 'logout_redirect', $redirect_to, $requested_redirect_to, $old_user ); } else { /** This filter is documented in wp-login.php */ $redirect_to = apply_filters( 'login_redirect', $redirect_to, $requested_redirect_to, $new_user ); } return $redirect_to; } /** * Displays the 'Switched to {user}' and 'Switch back to {user}' messages in the admin area. */ public function action_admin_notices() { $user = wp_get_current_user(); $old_user = self::get_old_user(); if ( $old_user ) { $switched_locale = false; $lang_attr = ''; if ( function_exists( 'get_user_locale' ) ) { $locale = get_user_locale( $old_user ); $switched_locale = switch_to_locale( $locale ); $lang_attr = str_replace( '_', '-', $locale ); } ?>
', esc_attr( $lang_attr ) ); } else { echo '

'; } ?> display_name, $user->user_login ) ); } $switch_back_url = add_query_arg( array( 'redirect_to' => urlencode( self::current_url() ), ), self::switch_back_url( $old_user ) ); $message .= sprintf( ' %s.', esc_url( $switch_back_url ), esc_html( sprintf( /* Translators: 1: user display name; 2: username; */ __( 'Switch back to %1$s (%2$s)', 'user-switching' ), $old_user->display_name, $old_user->user_login ) ) ); /** * Filters the contents of the message that's displayed to switched users in the admin area. * * @since 1.1.0 * * @param string $message The message displayed to the switched user. * @param WP_User $user The current user object. * @param WP_User $old_user The old user object. * @param string $switch_back_url The switch back URL. * @param bool $just_switched Whether the user made the switch on this page request. */ $message = apply_filters( 'user_switching_switched_message', $message, $user, $old_user, $switch_back_url, $just_switched ); echo wp_kses( $message, array( 'a' => array( 'href' => array(), ), ) ); ?>

display_name, $user->user_login ) ); } else { echo esc_html( sprintf( /* Translators: 1: user display name; 2: username; */ __( 'Switched to %1$s (%2$s).', 'user-switching' ), $user->display_name, $user->user_login ) ); } ?>

ID === $old_user_id ); } } return false; } /** * Adds a 'Switch back to {user}' link to the account menu, and a `Switch To` link to the user edit menu. * * @param WP_Admin_Bar $wp_admin_bar The admin bar object. */ public function action_admin_bar_menu( WP_Admin_Bar $wp_admin_bar ) { if ( ! is_admin_bar_showing() ) { return; } if ( method_exists( $wp_admin_bar, 'get_node' ) ) { if ( $wp_admin_bar->get_node( 'user-actions' ) ) { $parent = 'user-actions'; } else { return; } } elseif ( get_option( 'show_avatars' ) ) { $parent = 'my-account-with-avatar'; } else { $parent = 'my-account'; } $old_user = self::get_old_user(); if ( $old_user ) { $wp_admin_bar->add_node( array( 'parent' => $parent, 'id' => 'switch-back', 'title' => esc_html( sprintf( /* Translators: 1: user display name; 2: username; */ __( 'Switch back to %1$s (%2$s)', 'user-switching' ), $old_user->display_name, $old_user->user_login ) ), 'href' => add_query_arg( array( 'redirect_to' => urlencode( self::current_url() ), ), self::switch_back_url( $old_user ) ), ) ); } if ( current_user_can( 'switch_off' ) ) { $url = self::switch_off_url( wp_get_current_user() ); if ( ! is_admin() ) { $url = add_query_arg( array( 'redirect_to' => urlencode( self::current_url() ), ), $url ); } $wp_admin_bar->add_node( array( 'parent' => $parent, 'id' => 'switch-off', /* Translators: "switch off" means to temporarily log out */ 'title' => esc_html__( 'Switch Off', 'user-switching' ), 'href' => $url, ) ); } if ( ! is_admin() && is_author() && ( get_queried_object() instanceof WP_User ) ) { if ( $old_user ) { $wp_admin_bar->add_node( array( 'parent' => 'edit', 'id' => 'author-switch-back', 'title' => esc_html( sprintf( /* Translators: 1: user display name; 2: username; */ __( 'Switch back to %1$s (%2$s)', 'user-switching' ), $old_user->display_name, $old_user->user_login ) ), 'href' => add_query_arg( array( 'redirect_to' => urlencode( self::current_url() ), ), self::switch_back_url( $old_user ) ), ) ); } elseif ( current_user_can( 'switch_to_user', get_queried_object_id() ) ) { $wp_admin_bar->add_node( array( 'parent' => 'edit', 'id' => 'author-switch-to', 'title' => esc_html__( 'Switch To', 'user-switching' ), 'href' => add_query_arg( array( 'redirect_to' => urlencode( self::current_url() ), ), self::switch_to_url( get_queried_object() ) ), ) ); } } } /** * Adds a 'Switch back to {user}' link to the Meta sidebar widget. */ public function action_wp_meta() { $old_user = self::get_old_user(); if ( $old_user instanceof WP_User ) { $link = sprintf( /* Translators: 1: user display name; 2: username; */ __( 'Switch back to %1$s (%2$s)', 'user-switching' ), $old_user->display_name, $old_user->user_login ); $url = add_query_arg( array( 'redirect_to' => urlencode( self::current_url() ), ), self::switch_back_url( $old_user ) ); printf( '
  • %s
    • ', esc_url( $url ), esc_html( $link ) ); } } /** * Adds a 'Switch back to {user}' link to the WordPress footer if the admin toolbar isn't showing. */ public function action_wp_footer() { if ( is_admin_bar_showing() || did_action( 'wp_meta' ) ) { return; } $old_user = self::get_old_user(); if ( $old_user instanceof WP_User ) { $link = sprintf( /* Translators: 1: user display name; 2: username; */ __( 'Switch back to %1$s (%2$s)', 'user-switching' ), $old_user->display_name, $old_user->user_login ); $url = add_query_arg( array( 'redirect_to' => urlencode( self::current_url() ), ), self::switch_back_url( $old_user ) ); printf( '

    %s

    ', esc_url( $url ), esc_html( $link ) ); } } /** * Adds a 'Switch back to {user}' link to the WordPress login screen. * * @param string $message The login screen message. * @return string The login screen message. */ public function filter_login_message( $message ) { $old_user = self::get_old_user(); if ( $old_user instanceof WP_User ) { $link = sprintf( /* Translators: 1: user display name; 2: username; */ __( 'Switch back to %1$s (%2$s)', 'user-switching' ), $old_user->display_name, $old_user->user_login ); $url = self::switch_back_url( $old_user ); if ( ! empty( $_REQUEST['interim-login'] ) ) { $url = add_query_arg( array( 'interim-login' => '1', ), $url ); } elseif ( ! empty( $_REQUEST['redirect_to'] ) ) { $url = add_query_arg( array( 'redirect_to' => urlencode( wp_unslash( $_REQUEST['redirect_to'] ) ), ), $url ); } $message .= '

    '; $message .= ' '; $message .= sprintf( '%2$s', esc_url( $url ), esc_html( $link ) ); $message .= '

    '; } return $message; } /** * Adds a 'Switch To' link to each list of user actions on the Users screen. * * @param string[] $actions Array of actions to display for this user row. * @param WP_User $user The user object displayed in this row. * @return string[] Array of actions to display for this user row. */ public function filter_user_row_actions( array $actions, WP_User $user ) { $link = self::maybe_switch_url( $user ); if ( ! $link ) { return $actions; } $actions['switch_to_user'] = sprintf( '%s', esc_url( $link ), esc_html__( 'Switch To', 'user-switching' ) ); return $actions; } /** * Adds a 'Switch To' link to each member's profile page and profile listings in BuddyPress. */ public function action_bp_button() { $user = null; if ( bp_is_user() ) { $user = get_userdata( bp_displayed_user_id() ); } elseif ( bp_is_members_directory() ) { $user = get_userdata( bp_get_member_user_id() ); } if ( ! $user ) { return; } $link = self::maybe_switch_url( $user ); if ( ! $link ) { return; } $link = add_query_arg( array( 'redirect_to' => urlencode( bp_core_get_user_domain( $user->ID ) ), ), $link ); $components = array_keys( buddypress()->active_components ); echo bp_get_button( array( 'id' => 'user_switching', 'component' => reset( $components ), 'link_href' => esc_url( $link ), 'link_text' => esc_html__( 'Switch To', 'user-switching' ), 'wrapper_id' => 'user_switching_switch_to', ) ); } /** * Adds a 'Switch To' link to each member's profile page in bbPress. */ public function action_bbpress_button() { $user = get_userdata( bbp_get_user_id() ); if ( ! $user ) { return; } $link = self::maybe_switch_url( $user ); if ( ! $link ) { return; } $link = add_query_arg( array( 'redirect_to' => urlencode( bbp_get_user_profile_url( $user->ID ) ), ), $link ); echo ''; } /** * Filters the list of query arguments which get removed from admin area URLs in WordPress. * * @link https://core.trac.wordpress.org/ticket/23367 * * @param string[] $args Array of removable query arguments. * @return string[] Updated array of removable query arguments. */ public function filter_removable_query_args( array $args ) { return array_merge( $args, array( 'user_switched', 'switched_off', 'switched_back', ) ); } /** * Returns the switch to or switch back URL for a given user. * * @param WP_User $user The user to be switched to. * @return string|false The required URL, or false if there's no old user or the user doesn't have the required capability. */ public static function maybe_switch_url( WP_User $user ) { $old_user = self::get_old_user(); if ( $old_user && ( $old_user->ID === $user->ID ) ) { return self::switch_back_url( $old_user ); } elseif ( current_user_can( 'switch_to_user', $user->ID ) ) { return self::switch_to_url( $user ); } else { return false; } } /** * Returns the nonce-secured URL needed to switch to a given user ID. * * @param WP_User $user The user to be switched to. * @return string The required URL. */ public static function switch_to_url( WP_User $user ) { return wp_nonce_url( add_query_arg( array( 'action' => 'switch_to_user', 'user_id' => $user->ID, 'nr' => 1, ), wp_login_url() ), "switch_to_user_{$user->ID}" ); } /** * Returns the nonce-secured URL needed to switch back to the originating user. * * @param WP_User $user The old user. * @return string The required URL. */ public static function switch_back_url( WP_User $user ) { return wp_nonce_url( add_query_arg( array( 'action' => 'switch_to_olduser', 'nr' => 1, ), wp_login_url() ), "switch_to_olduser_{$user->ID}" ); } /** * Returns the nonce-secured URL needed to switch off the current user. * * @param WP_User $user The user to be switched off. * @return string The required URL. */ public static function switch_off_url( WP_User $user ) { return wp_nonce_url( add_query_arg( array( 'action' => 'switch_off', 'nr' => 1, ), wp_login_url() ), "switch_off_{$user->ID}" ); } /** * Returns the current URL. * * @return string The current URL. */ public static function current_url() { return ( is_ssl() ? 'https://' : 'http://' ) . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI']; } /** * Removes a list of common confirmation-style query args from a URL. * * @param string $url A URL. * @return string The URL with query args removed. */ public static function remove_query_args( $url ) { if ( function_exists( 'wp_removable_query_args' ) ) { $url = remove_query_arg( wp_removable_query_args(), $url ); } return $url; } /** * Returns whether or not User Switching's equivalent of the 'logged_in' cookie should be secure. * * This is used to set the 'secure' flag on the old user cookie, for enhanced security. * * @link https://core.trac.wordpress.org/ticket/15330 * * @return bool Should the old user cookie be secure? */ public static function secure_olduser_cookie() { return ( is_ssl() && ( 'https' === parse_url( home_url(), PHP_URL_SCHEME ) ) ); } /** * Returns whether or not User Switching's equivalent of the 'auth' cookie should be secure. * * This is used to determine whether to set a secure auth cookie or not. * * @return bool Should the auth cookie be secure? */ public static function secure_auth_cookie() { return ( is_ssl() && ( 'https' === parse_url( wp_login_url(), PHP_URL_SCHEME ) ) ); } /** * Instructs WooCommerce to forget the session for the current user, without deleting it. */ public function forget_woocommerce_session() { if ( ! function_exists( 'WC' ) ) { return; } $wc = WC(); if ( ! property_exists( $wc, 'session' ) ) { return; } if ( ! method_exists( $wc->session, 'forget_session' ) ) { return; } $wc->session->forget_session(); } /** * Filters a user's capabilities so they can be altered at runtime. * * This is used to: * - Grant the 'switch_to_user' capability to the user if they have the ability to edit the user they're trying to * switch to (and that user is not themselves). * - Grant the 'switch_off' capability to the user if they can edit other users. * * Important: This does not get called for Super Admins. See filter_map_meta_cap() below. * * @param bool[] $user_caps Array of key/value pairs where keys represent a capability name and boolean values * represent whether the user has that capability. * @param string[] $required_caps Array of required primitive capabilities for the requested capability. * @param array $args { * Arguments that accompany the requested capability check. * * @type string $0 Requested capability. * @type int $1 Concerned user ID. * @type mixed ...$2 Optional second and further parameters. * } * @param WP_User $user Concerned user object. * @return bool[] Array of concerned user's capabilities. */ public function filter_user_has_cap( array $user_caps, array $required_caps, array $args, WP_User $user ) { if ( 'switch_to_user' === $args[0] ) { if ( empty( $args[2] ) ) { $user_caps['switch_to_user'] = false; return $user_caps; } if ( array_key_exists( 'switch_users', $user_caps ) ) { $user_caps['switch_to_user'] = $user_caps['switch_users']; return $user_caps; } $user_caps['switch_to_user'] = ( user_can( $user->ID, 'edit_user', $args[2] ) && ( $args[2] !== $user->ID ) ); } elseif ( 'switch_off' === $args[0] ) { if ( array_key_exists( 'switch_users', $user_caps ) ) { $user_caps['switch_off'] = $user_caps['switch_users']; return $user_caps; } $user_caps['switch_off'] = user_can( $user->ID, 'edit_users' ); } return $user_caps; } /** * Filters the required primitive capabilities for the given primitive or meta capability. * * This is used to: * - Add the 'do_not_allow' capability to the list of required capabilities when a Super Admin is trying to switch * to themselves. * * It affects nothing else as Super Admins can do everything by default. * * @param string[] $required_caps Array of required primitive capabilities for the requested capability. * @param string $cap Capability or meta capability being checked. * @param int $user_id Concerned user ID. * @param array $args { * Arguments that accompany the requested capability check. * * @type mixed ...$0 Optional second and further parameters. * } * @return string[] Array of required capabilities for the requested action. */ public function filter_map_meta_cap( array $required_caps, $cap, $user_id, array $args ) { if ( 'switch_to_user' === $cap ) { if ( empty( $args[0] ) || $args[0] === $user_id ) { $required_caps[] = 'do_not_allow'; } } return $required_caps; } /** * Singleton instantiator. * * @return user_switching User Switching instance. */ public static function get_instance() { static $instance; if ( ! isset( $instance ) ) { $instance = new user_switching(); } return $instance; } /** * Private class constructor. Use `get_instance()` to get the instance. */ final private function __construct() {} } if ( ! function_exists( 'user_switching_set_olduser_cookie' ) ) { /** * Sets authorisation cookies containing the originating user information. * * @since 1.4.0 The `$token` parameter was added. * * @param int $old_user_id The ID of the originating user, usually the current logged in user. * @param bool $pop Optional. Pop the latest user off the auth cookie, instead of appending the new one. Default false. * @param string $token Optional. The old user's session token to store for later reuse. Default empty string. */ function user_switching_set_olduser_cookie( $old_user_id, $pop = false, $token = '' ) { $secure_auth_cookie = user_switching::secure_auth_cookie(); $secure_olduser_cookie = user_switching::secure_olduser_cookie(); $expiration = time() + 172800; // 48 hours $auth_cookie = user_switching_get_auth_cookie(); $olduser_cookie = wp_generate_auth_cookie( $old_user_id, $expiration, 'logged_in', $token ); if ( $secure_auth_cookie ) { $auth_cookie_name = USER_SWITCHING_SECURE_COOKIE; $scheme = 'secure_auth'; } else { $auth_cookie_name = USER_SWITCHING_COOKIE; $scheme = 'auth'; } if ( $pop ) { array_pop( $auth_cookie ); } else { array_push( $auth_cookie, wp_generate_auth_cookie( $old_user_id, $expiration, $scheme, $token ) ); } $auth_cookie = json_encode( $auth_cookie ); /** * Fires immediately before the User Switching authentication cookie is set. * * @since 1.4.0 * * @param string $auth_cookie JSON-encoded array of authentication cookie values. * @param int $expiration The time when the authentication cookie expires as a UNIX timestamp. * Default is 48 hours from now. * @param int $old_user_id User ID. * @param string $scheme Authentication scheme. Values include 'auth' or 'secure_auth'. * @param string $token User's session token to use for the latest cookie. */ do_action( 'set_user_switching_cookie', $auth_cookie, $expiration, $old_user_id, $scheme, $token ); $scheme = 'logged_in'; /** * Fires immediately before the User Switching old user cookie is set. * * @since 1.4.0 * * @param string $olduser_cookie The old user cookie value. * @param int $expiration The time when the logged-in authentication cookie expires as a UNIX timestamp. * Default is 48 hours from now. * @param int $old_user_id User ID. * @param string $scheme Authentication scheme. Default 'logged_in'. * @param string $token User's session token to use for this cookie. */ do_action( 'set_olduser_cookie', $olduser_cookie, $expiration, $old_user_id, $scheme, $token ); /** * Allows preventing auth cookies from actually being sent to the client. * * @since 1.5.4 * * @param bool $send Whether to send auth cookies to the client. */ if ( ! apply_filters( 'user_switching_send_auth_cookies', true ) ) { return; } setcookie( $auth_cookie_name, $auth_cookie, $expiration, SITECOOKIEPATH, COOKIE_DOMAIN, $secure_auth_cookie, true ); setcookie( USER_SWITCHING_OLDUSER_COOKIE, $olduser_cookie, $expiration, COOKIEPATH, COOKIE_DOMAIN, $secure_olduser_cookie, true ); } } if ( ! function_exists( 'user_switching_clear_olduser_cookie' ) ) { /** * Clears the cookies containing the originating user, or pops the latest item off the end if there's more than one. * * @param bool $clear_all Optional. Whether to clear the cookies (as opposed to just popping the last user off the end). Default true. */ function user_switching_clear_olduser_cookie( $clear_all = true ) { $auth_cookie = user_switching_get_auth_cookie(); if ( ! empty( $auth_cookie ) ) { array_pop( $auth_cookie ); } if ( $clear_all || empty( $auth_cookie ) ) { /** * Fires just before the user switching cookies are cleared. * * @since 1.4.0 */ do_action( 'clear_olduser_cookie' ); /** This filter is documented in user-switching.php */ if ( ! apply_filters( 'user_switching_send_auth_cookies', true ) ) { return; } $expire = time() - 31536000; setcookie( USER_SWITCHING_COOKIE, ' ', $expire, SITECOOKIEPATH, COOKIE_DOMAIN ); setcookie( USER_SWITCHING_SECURE_COOKIE, ' ', $expire, SITECOOKIEPATH, COOKIE_DOMAIN ); setcookie( USER_SWITCHING_OLDUSER_COOKIE, ' ', $expire, COOKIEPATH, COOKIE_DOMAIN ); } else { if ( user_switching::secure_auth_cookie() ) { $scheme = 'secure_auth'; } else { $scheme = 'auth'; } $old_cookie = end( $auth_cookie ); $old_user_id = wp_validate_auth_cookie( $old_cookie, $scheme ); if ( $old_user_id ) { $parts = wp_parse_auth_cookie( $old_cookie, $scheme ); user_switching_set_olduser_cookie( $old_user_id, true, $parts['token'] ); } } } } if ( ! function_exists( 'user_switching_get_olduser_cookie' ) ) { /** * Gets the value of the cookie containing the originating user. * * @return string|false The old user cookie, or boolean false if there isn't one. */ function user_switching_get_olduser_cookie() { if ( isset( $_COOKIE[ USER_SWITCHING_OLDUSER_COOKIE ] ) ) { return wp_unslash( $_COOKIE[ USER_SWITCHING_OLDUSER_COOKIE ] ); } else { return false; } } } if ( ! function_exists( 'user_switching_get_auth_cookie' ) ) { /** * Gets the value of the auth cookie containing the list of originating users. * * @return string[] Array of originating user authentication cookie values. Empty array if there are none. */ function user_switching_get_auth_cookie() { if ( user_switching::secure_auth_cookie() ) { $auth_cookie_name = USER_SWITCHING_SECURE_COOKIE; } else { $auth_cookie_name = USER_SWITCHING_COOKIE; } if ( isset( $_COOKIE[ $auth_cookie_name ] ) && is_string( $_COOKIE[ $auth_cookie_name ] ) ) { $cookie = json_decode( wp_unslash( $_COOKIE[ $auth_cookie_name ] ) ); } if ( ! isset( $cookie ) || ! is_array( $cookie ) ) { $cookie = array(); } return $cookie; } } if ( ! function_exists( 'switch_to_user' ) ) { /** * Switches the current logged in user to the specified user. * * @param int $user_id The ID of the user to switch to. * @param bool $remember Optional. Whether to 'remember' the user in the form of a persistent browser cookie. Default false. * @param bool $set_old_user Optional. Whether to set the old user cookie. Default true. * @return false|WP_User WP_User object on success, false on failure. */ function switch_to_user( $user_id, $remember = false, $set_old_user = true ) { $user = get_userdata( $user_id ); if ( ! $user ) { return false; } $old_user_id = ( is_user_logged_in() ) ? get_current_user_id() : false; $old_token = function_exists( 'wp_get_session_token' ) ? wp_get_session_token() : ''; $auth_cookie = user_switching_get_auth_cookie(); $cookie_parts = wp_parse_auth_cookie( end( $auth_cookie ) ); if ( $set_old_user && $old_user_id ) { // Switching to another user $new_token = ''; user_switching_set_olduser_cookie( $old_user_id, false, $old_token ); } else { // Switching back, either after being switched off or after being switched to another user $new_token = isset( $cookie_parts['token'] ) ? $cookie_parts['token'] : ''; user_switching_clear_olduser_cookie( false ); } /** * Attaches the original user ID and session token to the new session when a user switches to another user. * * @param array $session Array of extra data. * @param int $user_id User ID. * @return array Array of extra data. */ $session_filter = function( array $session, $user_id ) use ( $old_user_id, $old_token ) { $session['switched_from_id'] = $old_user_id; $session['switched_from_session'] = $old_token; return $session; }; add_filter( 'attach_session_information', $session_filter, 99, 2 ); wp_clear_auth_cookie(); wp_set_auth_cookie( $user_id, $remember, '', $new_token ); wp_set_current_user( $user_id ); remove_filter( 'attach_session_information', $session_filter, 99 ); if ( $set_old_user ) { /** * Fires when a user switches to another user account. * * @since 0.6.0 * @since 1.4.0 The `$new_token` and `$old_token` parameters were added. * * @param int $user_id The ID of the user being switched to. * @param int $old_user_id The ID of the user being switched from. * @param string $new_token The token of the session of the user being switched to. Can be an empty string * or a token for a session that may or may not still be valid. * @param string $old_token The token of the session of the user being switched from. */ do_action( 'switch_to_user', $user_id, $old_user_id, $new_token, $old_token ); } else { /** * Fires when a user switches back to their originating account. * * @since 0.6.0 * @since 1.4.0 The `$new_token` and `$old_token` parameters were added. * * @param int $user_id The ID of the user being switched back to. * @param int|false $old_user_id The ID of the user being switched from, or false if the user is switching back * after having been switched off. * @param string $new_token The token of the session of the user being switched to. Can be an empty string * or a token for a session that may or may not still be valid. * @param string $old_token The token of the session of the user being switched from. */ do_action( 'switch_back_user', $user_id, $old_user_id, $new_token, $old_token ); } if ( $old_token && $old_user_id && ! $set_old_user ) { // When switching back, destroy the session for the old user $manager = WP_Session_Tokens::get_instance( $old_user_id ); $manager->destroy( $old_token ); } return $user; } } if ( ! function_exists( 'switch_off_user' ) ) { /** * Switches off the current logged in user. This logs the current user out while retaining a cookie allowing them to log * straight back in using the 'Switch back to {user}' system. * * @return bool True on success, false on failure. */ function switch_off_user() { $old_user_id = get_current_user_id(); if ( ! $old_user_id ) { return false; } $old_token = function_exists( 'wp_get_session_token' ) ? wp_get_session_token() : ''; user_switching_set_olduser_cookie( $old_user_id, false, $old_token ); wp_clear_auth_cookie(); wp_set_current_user( 0 ); /** * Fires when a user switches off. * * @since 0.6.0 * @since 1.4.0 The `$old_token` parameter was added. * * @param int $old_user_id The ID of the user switching off. * @param string $old_token The token of the session of the user switching off. */ do_action( 'switch_off_user', $old_user_id, $old_token ); return true; } } if ( ! function_exists( 'current_user_switched' ) ) { /** * Returns whether or not the current user switched into their account. * * @return false|WP_User False if the user isn't logged in or they didn't switch in; old user object (which evaluates to * true) if the user switched into the current user account. */ function current_user_switched() { if ( ! is_user_logged_in() ) { return false; } return user_switching::get_old_user(); } } $GLOBALS['user_switching'] = user_switching::get_instance(); $GLOBALS['user_switching']->init_hooks();