get_error_codes() == array('empty_username', 'empty_password') ) {
$user = new WP_Error('', '');
}
return $user;
}
wp_set_auth_cookie($user->ID, $credentials['remember'], $secure_cookie);
do_action('wp_login', $credentials['user_login']);
return $user;
}
/**
* Authenticate the user using the username and password.
*/
add_filter('authenticate', 'wp_authenticate_username_password', 20, 3);
function wp_authenticate_username_password($user, $username, $password) {
if ( is_a($user, 'WP_User') ) { return $user; }
if ( empty($username) || empty($password) ) {
$error = new WP_Error();
if ( empty($username) )
$error->add('empty_username', __('ERROR: The username field is empty.'));
if ( empty($password) )
$error->add('empty_password', __('ERROR: The password field is empty.'));
return $error;
}
$userdata = get_user_by('login', $username);
if ( !$userdata )
return new WP_Error('invalid_username', sprintf(__('ERROR: Invalid username. Lost your password?'), site_url('wp-login.php?action=lostpassword', 'login')));
if ( is_multisite() ) {
// Is user marked as spam?
if ( 1 == $userdata->spam)
return new WP_Error('invalid_username', __('ERROR: Your account has been marked as a spammer.'));
// Is a user's blog marked as spam?
if ( !is_super_admin( $userdata->ID ) && isset($userdata->primary_blog) ) {
$details = get_blog_details( $userdata->primary_blog );
if ( is_object( $details ) && $details->spam == 1 )
return new WP_Error('blog_suspended', __('Blog Suspended.'));
}
}
$userdata = apply_filters('wp_authenticate_user', $userdata, $password);
if ( is_wp_error($userdata) )
return $userdata;
if ( !wp_check_password($password, $userdata->user_pass, $userdata->ID) )
return new WP_Error('incorrect_password', sprintf(__('ERROR: Incorrect password. Lost your password?'), site_url('wp-login.php?action=lostpassword', 'login')));
$user = new WP_User($userdata->ID);
return $user;
}
/**
* Authenticate the user using the WordPress auth cookie.
*/
function wp_authenticate_cookie($user, $username, $password) {
if ( is_a($user, 'WP_User') ) { return $user; }
if ( empty($username) && empty($password) ) {
$user_id = wp_validate_auth_cookie();
if ( $user_id )
return new WP_User($user_id);
global $auth_secure_cookie;
if ( $auth_secure_cookie )
$auth_cookie = SECURE_AUTH_COOKIE;
else
$auth_cookie = AUTH_COOKIE;
if ( !empty($_COOKIE[$auth_cookie]) )
return new WP_Error('expired_session', __('Please log in again.'));
// If the cookie is not set, be silent.
}
return $user;
}
/**
* Number of posts user has written.
*
* @since 3.0.0
* @uses $wpdb WordPress database object for queries.
*
* @param int $userid User ID.
* @return int Amount of posts user has written.
*/
function count_user_posts($userid) {
global $wpdb;
$where = get_posts_by_author_sql('post', TRUE, $userid);
$count = $wpdb->get_var( "SELECT COUNT(*) FROM $wpdb->posts $where" );
return apply_filters('get_usernumposts', $count, $userid);
}
/**
* Number of posts written by a list of users.
*
* @since 3.0.0
* @param array $userid User ID number list.
* @return array Amount of posts each user has written.
*/
function count_many_users_posts($users) {
global $wpdb;
$count = array();
if ( ! is_array($users) || empty( $users ) )
return $count;
$userlist = implode( ',', $users );
$where = get_posts_by_author_sql( 'post' );
$result = $wpdb->get_results( "SELECT post_author, COUNT(*) FROM $wpdb->posts $where AND post_author IN ($userlist) GROUP BY post_author", ARRAY_N );
foreach ( $result as $row ) {
$count[ $row[0] ] = $row[1];
}
foreach ( $users as $id ) {
if ( ! isset( $count[ $id ] ) )
$count[ $id ] = 0;
}
return $count;
}
/**
* 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 per Site or per Network.
*
* 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 per site name and then the per Network name.
*
* @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.
* @param bool $deprecated Use get_option() to check for an option in the options table.
* @return mixed
*/
function get_user_option( $option, $user = 0, $deprecated = '' ) {
global $wpdb;
if ( !empty( $deprecated ) )
_deprecated_argument( __FUNCTION__, '3.0' );
if ( empty($user) ) {
$user = wp_get_current_user();
$user = $user->ID;
}
$user = get_userdata($user);
// Keys used as object vars cannot have dashes.
$key = str_replace('-', '_', $option);
if ( isset( $user->{$wpdb->prefix . $key} ) ) // Blog specific
$result = $user->{$wpdb->prefix . $key};
elseif ( isset( $user->{$key} ) ) // User specific and cross-blog
$result = $user->{$key};
else
$result = false;
return apply_filters("get_user_option_{$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 default
* it will prepend the WordPress table prefix to the option name.
*
* Deletes the user option if $newvalue is empty.
*
* @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 global or blog specific. Default false (blog specific).
* @return unknown
*/
function update_user_option( $user_id, $option_name, $newvalue, $global = false ) {
global $wpdb;
if ( !$global )
$option_name = $wpdb->prefix . $option_name;
// For backward compatibility. See differences between update_user_meta() and deprecated update_usermeta().
// http://core.trac.wordpress.org/ticket/13088
if ( is_null( $newvalue ) || is_scalar( $newvalue ) && empty( $newvalue ) )
return delete_user_meta( $user_id, $option_name );
return update_user_meta( $user_id, $option_name, $newvalue );
}
/**
* Delete 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 default
* it will prepend the WordPress table prefix to the option name.
*
* @since 3.0.0
* @uses $wpdb WordPress database object for queries
*
* @param int $user_id User ID
* @param string $option_name User option name.
* @param bool $global Optional. Whether option name is global or blog specific. Default false (blog specific).
* @return unknown
*/
function delete_user_option( $user_id, $option_name, $global = false ) {
global $wpdb;
if ( !$global )
$option_name = $wpdb->prefix . $option_name;
return delete_user_meta( $user_id, $option_name );
}
/**
* 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;
$blog_prefix = $wpdb->get_blog_prefix($id);
$users = $wpdb->get_results( "SELECT user_id, user_id AS ID, user_login, display_name, user_email, meta_value FROM $wpdb->users, $wpdb->usermeta WHERE {$wpdb->users}.ID = {$wpdb->usermeta}.user_id AND meta_key = '{$blog_prefix}capabilities' ORDER BY {$wpdb->usermeta}.user_id" );
return $users;
}
/**
* Add meta data field to a user.
*
* Post meta data is called "Custom Fields" on the Administration Panels.
*
* @since 3.0.0
* @uses add_metadata()
* @link http://codex.wordpress.org/Function_Reference/add_user_meta
*
* @param int $user_id Post ID.
* @param string $key Metadata name.
* @param mixed $value Metadata value.
* @param bool $unique Optional, default is false. Whether the same key should not be added.
* @return bool False for failure. True for success.
*/
function add_user_meta($user_id, $meta_key, $meta_value, $unique = false) {
return add_metadata('user', $user_id, $meta_key, $meta_value, $unique);
}
/**
* Remove metadata matching criteria from a user.
*
* You can match based on the key, or key and value. Removing based on key and
* value, will keep from removing duplicate metadata with the same key. It also
* allows removing all metadata matching key, if needed.
*
* @since 3.0.0
* @uses delete_metadata()
* @link http://codex.wordpress.org/Function_Reference/delete_user_meta
*
* @param int $user_id user ID
* @param string $meta_key Metadata name.
* @param mixed $meta_value Optional. Metadata value.
* @return bool False for failure. True for success.
*/
function delete_user_meta($user_id, $meta_key, $meta_value = '') {
return delete_metadata('user', $user_id, $meta_key, $meta_value);
}
/**
* Retrieve user meta field for a user.
*
* @since 3.0.0
* @uses get_metadata()
* @link http://codex.wordpress.org/Function_Reference/get_user_meta
*
* @param int $user_id Post ID.
* @param string $key The meta key to retrieve.
* @param bool $single Whether to return a single value.
* @return mixed Will be an array if $single is false. Will be value of meta data field if $single
* is true.
*/
function get_user_meta($user_id, $key, $single = false) {
return get_metadata('user', $user_id, $key, $single);
}
/**
* Update user meta field based on user ID.
*
* Use the $prev_value parameter to differentiate between meta fields with the
* same key and user ID.
*
* If the meta field for the user does not exist, it will be added.
*
* @since 3.0.0
* @uses update_metadata
* @link http://codex.wordpress.org/Function_Reference/update_user_meta
*
* @param int $user_id Post ID.
* @param string $key Metadata key.
* @param mixed $value Metadata value.
* @param mixed $prev_value Optional. Previous value to check before removing.
* @return bool False on failure, true if success.
*/
function update_user_meta($user_id, $meta_key, $meta_value, $prev_value = '') {
return update_metadata('user', $user_id, $meta_key, $meta_value, $prev_value);
}
/**
* Count number of users who have each of the user roles.
*
* Assumes there are neither duplicated nor orphaned capabilities meta_values.
* Assumes role names are unique phrases. Same assumption made by WP_User_Search::prepare_query()
* Using $strategy = 'time' this is CPU-intensive and should handle around 10^7 users.
* Using $strategy = 'memory' this is memory-intensive and should handle around 10^5 users, but see WP Bug #12257.
*
* @since 3.0.0
* @param string $strategy 'time' or 'memory'
* @return array Includes a grand total and an array of counts indexed by role strings.
*/
function count_users($strategy = 'time') {
global $wpdb, $blog_id, $wp_roles;
// Initialize
$id = (int) $blog_id;
$blog_prefix = $wpdb->get_blog_prefix($id);
$result = array();
if ( 'time' == $strategy ) {
global $wp_roles;
if ( ! isset( $wp_roles ) )
$wp_roles = new WP_Roles();
$avail_roles = $wp_roles->get_names();
// Build a CPU-intensive query that will return concise information.
$select_count = array();
foreach ( $avail_roles as $this_role => $name ) {
$select_count[] = "COUNT(NULLIF(`meta_value` LIKE '%" . like_escape($this_role) . "%', FALSE))";
}
$select_count = implode(', ', $select_count);
// Add the meta_value index to the selection list, then run the query.
$row = $wpdb->get_row( "SELECT $select_count, COUNT(*) FROM $wpdb->usermeta WHERE meta_key = '{$blog_prefix}capabilities'", ARRAY_N );
// Run the previous loop again to associate results with role names.
$col = 0;
$role_counts = array();
foreach ( $avail_roles as $this_role => $name ) {
$count = (int) $row[$col++];
if ($count > 0) {
$role_counts[$this_role] = $count;
}
}
// Get the meta_value index from the end of the result set.
$total_users = (int) $row[$col];
$result['total_users'] = $total_users;
$result['avail_roles'] =& $role_counts;
} else {
$avail_roles = array();
$users_of_blog = $wpdb->get_col( "SELECT meta_value FROM $wpdb->usermeta WHERE meta_key = '{$blog_prefix}capabilities'" );
foreach ( $users_of_blog as $caps_meta ) {
$b_roles = unserialize($caps_meta);
if ( is_array($b_roles) ) {
foreach ( $b_roles as $b_role => $val ) {
if ( isset($avail_roles[$b_role]) ) {
$avail_roles[$b_role]++;
} else {
$avail_roles[$b_role] = 1;
}
}
}
}
$result['total_users'] = count( $users_of_blog );
$result['avail_roles'] =& $avail_roles;
}
return $result;
}
//
// Private helper functions
//
/**
* Set up global user vars.
*
* Used by wp_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 $for_user_id Optional. User ID to set up global data.
*/
function setup_userdata($for_user_id = '') {
global $user_login, $userdata, $user_level, $user_ID, $user_email, $user_url, $user_pass_md5, $user_identity;
if ( '' == $for_user_id )
$user = wp_get_current_user();
else
$user = new WP_User($for_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:
*
*
show_option_all - Text to show all and whether HTML option exists.
*
show_option_none - Text for show none and whether HTML option exists.
*
*
orderby - SQL order by clause for what order the users appear. Default is
* 'display_name'.
*
order - Default is 'ASC'. Can also be 'DESC'.
*
include - User IDs to include.
*
exclude - User IDs to exclude.
*
multi - Default is 'false'. Whether to skip the ID attribute on the 'select' element. A 'true' value is overridden when id argument is set.
*
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
*
echo - Default is '1'. Whether to display or retrieve content.
*
selected - Which User ID is selected.
*
name - Default is 'user'. Name attribute of select element.
*
id - Default is the value of the 'name' parameter. ID attribute of select element.
*
class - Class attribute of select element.
*
blog_id - ID of blog (Multisite only). Defaults to ID of current blog.
*
*
* @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' => '', 'blog_id' => $GLOBALS['blog_id'],
'id' => '',
);
$defaults['selected'] = is_author() ? get_query_var( 'author' ) : 0;
$r = wp_parse_args( $args, $defaults );
extract( $r, EXTR_SKIP );
$blog_prefix = $wpdb->get_blog_prefix( $blog_id );
$query = "SELECT {$wpdb->users}.* FROM $wpdb->users, $wpdb->usermeta WHERE {$wpdb->users}.ID = {$wpdb->usermeta}.user_id AND meta_key = '{$blog_prefix}capabilities'";
$query_where = array();
if ( is_array($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 .= " AND " . join(' AND', $query_where);
$query .= " ORDER BY $orderby $order";
$users = $wpdb->get_results( $query );
$output = '';
if ( !empty($users) ) {
$name = esc_attr( $name );
if ( $multi && ! $id )
$id = '';
else
$id = $id ? " id='" . esc_attr( $id ) . "'" : "id='$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 intention is if the current data
* had been cached already, there would be no need to call this function.
*
* @access private
* @since 2.5.0
* @uses $wpdb WordPress database object for queries
*
* @param object $user The user data object.
*/
function _fill_user( &$user ) {
$metavalues = get_user_metavalues(array($user->ID));
_fill_single_user($user, $metavalues[$user->ID]);
}
/**
* Perform the query to get the $metavalues array(s) needed by _fill_user and _fill_many_users
*
* @since 3.0.0
* @param array $ids User ID numbers list.
* @return array of arrays. The array is indexed by user_id, containing $metavalues object arrays.
*/
function get_user_metavalues($ids) {
global $wpdb;
$clean = array_map('intval', $ids);
if ( 0 == count($clean) )
return $objects;
$list = implode(',', $clean);
$show = $wpdb->hide_errors();
$metavalues = $wpdb->get_results("SELECT user_id, meta_key, meta_value FROM $wpdb->usermeta WHERE user_id IN ($list)");
$wpdb->show_errors($show);
$objects = array();
foreach($clean as $id) {
$objects[$id] = array();
}
foreach($metavalues as $meta_object) {
$objects[$meta_object->user_id][] = $meta_object;
}
return $objects;
}
/**
* Unserialize user metadata, fill $user object, then cache everything.
*
* @since 3.0.0
* @param object $user The User object.
* @param array $metavalues An array of objects provided by get_user_metavalues()
*/
function _fill_single_user( &$user, &$metavalues ) {
global $wpdb;
foreach ( $metavalues as $meta ) {
$value = maybe_unserialize($meta->meta_value);
// Keys used as object vars cannot have dashes.
$key = str_replace('-', '_', $meta->meta_key);
$user->{$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 = $user->description;
update_user_caches($user);
}
/**
* Take an array of user objects, fill them with metas, and cache them.
*
* @since 3.0.0
* @param array $users User objects
* @param array $metas User metavalues objects
*/
function _fill_many_users( &$users ) {
$ids = array();
foreach($users as $user_object) {
$ids[] = $user_object->ID;
}
$metas = get_user_metavalues($ids);
foreach($users as $user_object) {
if (isset($metas[$user_object->ID])) {
_fill_single_user($user_object, $metas[$user_object->ID]);
}
}
}
/**
* Sanitize every user field.
*
* If the context is 'raw', then the user object or array will get minimal santization of the int fields.
*
* @since 2.3.0
* @uses sanitize_user_field() Used to sanitize the fields.
*
* @param object|array $user The User Object or Array
* @param string $context Optional, default is 'display'. How to sanitize user fields.
* @return object|array The now sanitized User Object or Array (will be the same type as $user)
*/
function sanitize_user_object($user, $context = 'display') {
if ( is_object($user) ) {
if ( !isset($user->ID) )
$user->ID = 0;
if ( isset($user->data) )
$vars = get_object_vars( $user->data );
else
$vars = get_object_vars($user);
foreach ( array_keys($vars) as $field ) {
if ( is_string($user->$field) || is_numeric($user->$field) )
$user->$field = sanitize_user_field($field, $user->$field, $user->ID, $context);
}
$user->filter = $context;
} else {
if ( !isset($user['ID']) )
$user['ID'] = 0;
foreach ( array_keys($user) as $field )
$user[$field] = sanitize_user_field($field, $user[$field], $user['ID'], $context);
$user['filter'] = $context;
}
return $user;
}
/**
* Sanitize user field based on context.
*
* Possible context values are: 'raw', 'edit', 'db', 'display', 'attribute' and 'js'. The
* 'display' context is used by default. 'attribute' and 'js' contexts are treated like 'display'
* when calling filters.
*
* @since 2.3.0
* @uses apply_filters() Calls 'edit_$field' and '${field_no_prefix}_edit_pre' passing $value and
* $user_id if $context == 'edit' and field name prefix == 'user_'.
*
* @uses apply_filters() Calls 'edit_user_$field' passing $value and $user_id if $context == 'db'.
* @uses apply_filters() Calls 'pre_$field' passing $value if $context == 'db' and field name prefix == 'user_'.
* @uses apply_filters() Calls '${field}_pre' passing $value if $context == 'db' and field name prefix != 'user_'.
*
* @uses apply_filters() Calls '$field' passing $value, $user_id and $context if $context == anything
* other than 'raw', 'edit' and 'db' and field name prefix == 'user_'.
* @uses apply_filters() Calls 'user_$field' passing $value if $context == anything other than 'raw',
* 'edit' and 'db' and field name prefix != 'user_'.
*
* @param string $field The user Object field name.
* @param mixed $value The user Object value.
* @param int $user_id user ID.
* @param string $context How to sanitize user fields. Looks for 'raw', 'edit', 'db', 'display',
* 'attribute' and 'js'.
* @return mixed Sanitized value.
*/
function sanitize_user_field($field, $value, $user_id, $context) {
$int_fields = array('ID');
if ( in_array($field, $int_fields) )
$value = (int) $value;
if ( 'raw' == $context )
return $value;
if ( !is_string($value) && !is_numeric($value) )
return $value;
$prefixed = false;
if ( false !== strpos($field, 'user_') ) {
$prefixed = true;
$field_no_prefix = str_replace('user_', '', $field);
}
if ( 'edit' == $context ) {
if ( $prefixed ) {
$value = apply_filters("edit_$field", $value, $user_id);
} else {
$value = apply_filters("edit_user_$field", $value, $user_id);
}
if ( 'description' == $field )
$value = esc_html($value);
else
$value = esc_attr($value);
} else if ( 'db' == $context ) {
if ( $prefixed ) {
$value = apply_filters("pre_$field", $value);
} else {
$value = apply_filters("pre_user_$field", $value);
}
} else {
// Use display filters by default.
if ( $prefixed )
$value = apply_filters($field, $value, $user_id, $context);
else
$value = apply_filters("user_$field", $value, $user_id, $context);
}
if ( 'user_url' == $field )
$value = esc_url($value);
if ( 'attribute' == $context )
$value = esc_attr($value);
else if ( 'js' == $context )
$value = esc_js($value);
return $value;
}
/**
* Update all user caches
*
* @since 3.0.0
*
* @param object $user User object to be cached
*/
function update_user_caches(&$user) {
wp_cache_add($user->ID, $user, 'users');
wp_cache_add($user->user_login, $user->ID, 'userlogins');
wp_cache_add($user->user_email, $user->ID, 'useremail');
wp_cache_add($user->user_nicename, $user->ID, 'userslugs');
}
/**
* Clean all user caches
*
* @since 3.0.0
*
* @param int $id User ID
*/
function clean_user_cache($id) {
global $current_user;
$user = new WP_User($id);
// If the current user changed, reset the current_user global.Œ
if ( isset($current_user) && $current_user->ID == $id ) {
$current_user->ID = -1; // Force wp_set_current_user to reset.
wp_set_current_user($id);
}
wp_cache_delete($id, 'users');
wp_cache_delete($user->user_login, 'userlogins');
wp_cache_delete($user->user_email, 'useremail');
wp_cache_delete($user->user_nicename, 'userslugs');
}
?>