add('empty_username', __('ERROR: The username field is empty.')); if ( empty($credentials['user_password']) ) $error->add('empty_password', __('ERROR: The password field is empty.')); return $error; } $user = wp_authenticate($credentials['user_login'], $credentials['user_password']); if ( is_wp_error($user) ) return $user; wp_set_auth_cookie($user->ID, $credentials['remember'], $secure_cookie); do_action('wp_login', $credentials['user_login']); return $user; } /** * Retrieve user data based on field. * * Use get_profile() will make a database query to get the value of the table * column. The value might be cached using the query cache, but care should be * taken when using the function to not make a lot of queries for retrieving * user profile information. * * If the $user parameter is not used, then the user will be retrieved from a * cookie of the user. Therefore, if the cookie does not exist, then no value * might be returned. Sanity checking must be done to ensure that when using * get_profile() that empty/null/false values are handled and that something is * at least displayed. * * @since 1.5.0 * @uses $wpdb WordPress database object to create queries. * * @param string $field User field to retrieve. * @param string $user Optional. User username. * @return string The value in the field. */ function get_profile($field, $user = false) { global $wpdb; if ( !$user ) $user = $wpdb->escape($_COOKIE[USER_COOKIE]); return $wpdb->get_var( $wpdb->prepare("SELECT $field FROM $wpdb->users WHERE user_login = %s", $user) ); } /** * Number of posts user has written. * * @since 0.71 * @uses $wpdb WordPress database object for queries. * * @param int $userid User ID. * @return int Amount of posts user has written. */ function get_usernumposts($userid) { global $wpdb; $userid = (int) $userid; $count = $wpdb->get_var( $wpdb->prepare("SELECT COUNT(*) FROM $wpdb->posts WHERE post_author = %d AND post_type = 'post' AND ", $userid) . get_private_posts_cap_sql('post')); return apply_filters('get_usernumposts', $count, $userid); } /** * Check that the user login name and password is correct. * * @since 0.71 * @todo xmlrpc only. Maybe move to xmlrpc.php. * * @param string $user_login User name. * @param string $user_pass User password. * @return bool False if does not authenticate, true if username and password authenticates. */ function user_pass_ok($user_login, $user_pass) { $user = wp_authenticate($user_login, $user_pass); if ( is_wp_error($user) ) return false; return true; } // // User option functions // /** * Retrieve user option that can be either global, user, or blog. * * If the user ID is not given, then the current user will be used instead. If * the user ID is given, then the user data will be retrieved. The filter for * the result, will also pass the original option name and finally the user data * object as the third parameter. * * The option will first check for the non-global name, then the global name, * and if it still doesn't find it, it will try the blog option. The option can * either be modified or set by a plugin. * * @since 2.0.0 * @uses $wpdb WordPress database object for queries. * @uses apply_filters() Calls 'get_user_option_$option' hook with result, * option parameter, and user data object. * * @param string $option User option name. * @param int $user Optional. User ID. * @return mixed */ function get_user_option( $option, $user = 0 ) { global $wpdb; $option = preg_replace('|[^a-z0-9_]|i', '', $option); if ( empty($user) ) $user = wp_get_current_user(); else $user = get_userdata($user); if ( isset( $user->{$wpdb->prefix . $option} ) ) // Blog specific $result = $user->{$wpdb->prefix . $option}; elseif ( isset( $user->{$option} ) ) // User specific and cross-blog $result = $user->{$option}; else // Blog global $result = get_option( $option ); return apply_filters("get_user_option_{$option}", $result, $option, $user); } /** * Update user option with global blog capability. * * User options are just like user metadata except that they have support for * global blog options. If the 'global' parameter is false, which it is by false * it will prepend the WordPress table prefix to the option name. * * @since 2.0.0 * @uses $wpdb WordPress database object for queries * * @param int $user_id User ID * @param string $option_name User option name. * @param mixed $newvalue User option value. * @param bool $global Optional. Whether option name is blog specific or not. * @return unknown */ function update_user_option( $user_id, $option_name, $newvalue, $global = false ) { global $wpdb; if ( !$global ) $option_name = $wpdb->prefix . $option_name; return update_usermeta( $user_id, $option_name, $newvalue ); } /** * Get users for the blog. * * For setups that use the multi-blog feature. Can be used outside of the * multi-blog feature. * * @since 2.2.0 * @uses $wpdb WordPress database object for queries * @uses $blog_id The Blog id of the blog for those that use more than one blog * * @param int $id Blog ID. * @return array List of users that are part of that Blog ID */ function get_users_of_blog( $id = '' ) { global $wpdb, $blog_id; if ( empty($id) ) $id = (int) $blog_id; $users = $wpdb->get_results( "SELECT user_id, user_login, display_name, user_email, meta_value FROM $wpdb->users, $wpdb->usermeta WHERE " . $wpdb->users . ".ID = " . $wpdb->usermeta . ".user_id AND meta_key = '" . $wpdb->prefix . "capabilities' ORDER BY {$wpdb->usermeta}.user_id" ); return $users; } // // User meta functions // /** * Remove user meta data. * * @since 2.0.0 * @uses $wpdb WordPress database object for queries. * * @param int $user_id User ID. * @param string $meta_key Metadata key. * @param mixed $meta_value Metadata value. * @return bool True deletion completed and false if user_id is not a number. */ function delete_usermeta( $user_id, $meta_key, $meta_value = '' ) { global $wpdb; if ( !is_numeric( $user_id ) ) return false; $meta_key = preg_replace('|[^a-z0-9_]|i', '', $meta_key); if ( is_array($meta_value) || is_object($meta_value) ) $meta_value = serialize($meta_value); $meta_value = trim( $meta_value ); if ( ! empty($meta_value) ) $wpdb->query( $wpdb->prepare("DELETE FROM $wpdb->usermeta WHERE user_id = %d AND meta_key = %s AND meta_value = %s", $user_id, $meta_key, $meta_value) ); else $wpdb->query( $wpdb->prepare("DELETE FROM $wpdb->usermeta WHERE user_id = %d AND meta_key = %s", $user_id, $meta_key) ); wp_cache_delete($user_id, 'users'); return true; } /** * Retrieve user metadata. * * If $user_id is not a number, then the function will fail over with a 'false' * boolean return value. Other returned values depend on whether there is only * one item to be returned, which be that single item type. If there is more * than one metadata value, then it will be list of metadata values. * * @since 2.0.0 * @uses $wpdb WordPress database object for queries. * * @param int $user_id User ID * @param string $meta_key Optional. Metadata key. * @return mixed */ function get_usermeta( $user_id, $meta_key = '') { global $wpdb; $user_id = (int) $user_id; if ( !$user_id ) return false; if ( !empty($meta_key) ) { $meta_key = preg_replace('|[^a-z0-9_]|i', '', $meta_key); $user = wp_cache_get($user_id, 'users'); // Check the cached user object if ( false !== $user && isset($user->$meta_key) ) $metas = array($user->$meta_key); else $metas = $wpdb->get_col( $wpdb->prepare("SELECT meta_value FROM $wpdb->usermeta WHERE user_id = %d AND meta_key = %s", $user_id, $meta_key) ); } else { $metas = $wpdb->get_col( $wpdb->prepare("SELECT meta_value FROM $wpdb->usermeta WHERE user_id = %d", $user_id) ); } if ( empty($metas) ) { if ( empty($meta_key) ) return array(); else return ''; } $metas = array_map('maybe_unserialize', $metas); if ( count($metas) == 1 ) return $metas[0]; else return $metas; } /** * Update metadata of user. * * There is no need to serialize values, they will be serialized if it is * needed. The metadata key can only be a string with underscores. All else will * be removed. * * Will remove the metadata, if the meta value is empty. * * @since 2.0.0 * @uses $wpdb WordPress database object for queries * * @param int $user_id User ID * @param string $meta_key Metadata key. * @param mixed $meta_value Metadata value. * @return bool True on successful update, false on failure. */ function update_usermeta( $user_id, $meta_key, $meta_value ) { global $wpdb; if ( !is_numeric( $user_id ) ) return false; $meta_key = preg_replace('|[^a-z0-9_]|i', '', $meta_key); /** @todo Might need fix because usermeta data is assumed to be already escaped */ if ( is_string($meta_value) ) $meta_value = stripslashes($meta_value); $meta_value = maybe_serialize($meta_value); if (empty($meta_value)) { return delete_usermeta($user_id, $meta_key); } $cur = $wpdb->get_row( $wpdb->prepare("SELECT * FROM $wpdb->usermeta WHERE user_id = %d AND meta_key = %s", $user_id, $meta_key) ); if ( !$cur ) { $wpdb->query( $wpdb->prepare("INSERT INTO $wpdb->usermeta ( user_id, meta_key, meta_value ) VALUES ( %d, %s, %s )", $user_id, $meta_key, $meta_value) ); } else if ( $cur->meta_value != $meta_value ) { $wpdb->query( $wpdb->prepare("UPDATE $wpdb->usermeta SET meta_value = %s WHERE user_id = %d AND meta_key = %s", $meta_value, $user_id, $meta_key) ); } else { return false; } wp_cache_delete($user_id, 'users'); return true; } // // Private helper functions // /** * Setup global user vars. * * Used by set_current_user() for back compat. Might be deprecated in the * future. * * @since 2.0.4 * @global string $userdata User description. * @global string $user_login The user username for logging in * @global int $user_level The level of the user * @global int $user_ID The ID of the user * @global string $user_email The email address of the user * @global string $user_url The url in the user's profile * @global string $user_pass_md5 MD5 of the user's password * @global string $user_identity The display name of the user * * @param int $user_id Optional. User ID to setup global data. */ function setup_userdata($user_id = '') { global $user_login, $userdata, $user_level, $user_ID, $user_email, $user_url, $user_pass_md5, $user_identity; if ( '' == $user_id ) $user = wp_get_current_user(); else $user = new WP_User($user_id); if ( 0 == $user->ID ) return; $userdata = $user->data; $user_login = $user->user_login; $user_level = (int) isset($user->user_level) ? $user->user_level : 0; $user_ID = (int) $user->ID; $user_email = $user->user_email; $user_url = $user->user_url; $user_pass_md5 = md5($user->user_pass); $user_identity = $user->display_name; } /** * Create dropdown HTML content of users. * * The content can either be displayed, which it is by default or retrieved by * setting the 'echo' argument. The 'include' and 'exclude' arguments do not * need to be used; all users will be displayed in that case. Only one can be * used, either 'include' or 'exclude', but not both. * * The available arguments are as follows: *
    *
  1. show_option_all - Text to show all and whether HTML option exists.
  2. *
  3. show_option_none - Text for show none and whether HTML option exists. *
  4. *
  5. orderby - SQL order by clause for what order the users appear. Default is * 'display_name'.
  6. *
  7. order - Default is 'ASC'. Can also be 'DESC'.
  8. *
  9. include - User IDs to include.
  10. *
  11. exclude - User IDs to exclude.
  12. *
  13. multi - Default is 'false'. Whether to skip the ID attribute on the 'select' element.
  14. *
  15. show - Default is 'display_name'. User table column to display. If the selected item is empty then the user_login will be displayed in parentesis
  16. *
  17. echo - Default is '1'. Whether to display or retrieve content.
  18. *
  19. selected - Which User ID is selected.
  20. *
  21. name - Default is 'user'. Name attribute of select element.
  22. *
  23. class - Class attribute of select element.
  24. *
* * @since 2.3.0 * @uses $wpdb WordPress database object for queries * * @param string|array $args Optional. Override defaults. * @return string|null Null on display. String of HTML content on retrieve. */ function wp_dropdown_users( $args = '' ) { global $wpdb; $defaults = array( 'show_option_all' => '', 'show_option_none' => '', 'orderby' => 'display_name', 'order' => 'ASC', 'include' => '', 'exclude' => '', 'multi' => 0, 'show' => 'display_name', 'echo' => 1, 'selected' => 0, 'name' => 'user', 'class' => '' ); $defaults['selected'] = is_author() ? get_query_var( 'author' ) : 0; $r = wp_parse_args( $args, $defaults ); extract( $r, EXTR_SKIP ); $query = "SELECT * FROM $wpdb->users"; $query_where = array(); if ( is_array($include) ) $include = join(',', $include); $include = preg_replace('/[^0-9,]/', '', $include); // (int) if ( $include ) $query_where[] = "ID IN ($include)"; if ( is_array($exclude) ) $exclude = join(',', $exclude); $exclude = preg_replace('/[^0-9,]/', '', $exclude); // (int) if ( $exclude ) $query_where[] = "ID NOT IN ($exclude)"; if ( $query_where ) $query .= " WHERE " . join(' AND', $query_where); $query .= " ORDER BY $orderby $order"; $users = $wpdb->get_results( $query ); $output = ''; if ( !empty($users) ) { $id = $multi ? "" : "id='$name'"; $output = ""; } $output = apply_filters('wp_dropdown_users', $output); if ( $echo ) echo $output; return $output; } /** * Add user meta data as properties to given user object. * * The finished user data is cached, but the cache is not used to fill in the * user data for the given object. Once the function has been used, the cache * should be used to retrieve user data. The purpose seems then to be to ensure * that the data in the object is always fresh. * * @access private * @since 2.5.0 * @uses $wpdb WordPress database object for queries * * @param object $user The user data object. */ function _fill_user( &$user ) { global $wpdb; $show = $wpdb->hide_errors(); $metavalues = $wpdb->get_results($wpdb->prepare("SELECT meta_key, meta_value FROM $wpdb->usermeta WHERE user_id = %d", $user->ID)); $wpdb->show_errors($show); if ( $metavalues ) { foreach ( (array) $metavalues as $meta ) { $value = maybe_unserialize($meta->meta_value); $user->{$meta->meta_key} = $value; } } $level = $wpdb->prefix . 'user_level'; if ( isset( $user->{$level} ) ) $user->user_level = $user->{$level}; // For backwards compat. if ( isset($user->first_name) ) $user->user_firstname = $user->first_name; if ( isset($user->last_name) ) $user->user_lastname = $user->last_name; if ( isset($user->description) ) $user->user_description = $user->description; wp_cache_add($user->ID, $user, 'users'); wp_cache_add($user->user_login, $user->ID, 'userlogins'); wp_cache_add($user->user_email, $user->ID, 'useremail'); } ?>