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.
* @param bool $check_blog_options Whether to check for an option in the options table if a per-user option does not exist. Default is true.
* @return mixed
*/
function get_user_option( $option, $user = 0, $check_blog_options = true ) {
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};
elseif ( $check_blog_options ) // Blog global
$result = get_option( $option );
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 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 $wpdb;
if ( empty($id) )
$id = (int) $wpdb->blogid;
$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->base_prefix . $id . "_capabilities' ORDER BY {$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:
*
*
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.
*
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.
*
class - Class attribute of select element.
*
*
* @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 = $user->description;
promote_if_site_admin($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');
}
?>