/
user.php
1486 lines (1270 loc) · 44.9 KB
/
user.php
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<?php
/**
* WordPress User API
*
* @package WordPress
*/
/**
* Authenticate user with remember capability.
*
* The credentials is an array that has 'user_login', 'user_password', and
* 'remember' indices. If the credentials is not given, then the log in form
* will be assumed and used if set.
*
* The various authentication cookies will be set by this function and will be
* set for a longer period depending on if the 'remember' credential is set to
* true.
*
* @since 2.5.0
*
* @param array $credentials Optional. User info in order to sign on.
* @param bool $secure_cookie Optional. Whether to use secure cookie.
* @return object Either WP_Error on failure, or WP_User on success.
*/
function wp_signon( $credentials = '', $secure_cookie = '' ) {
if ( empty($credentials) ) {
if ( ! empty($_POST['log']) )
$credentials['user_login'] = $_POST['log'];
if ( ! empty($_POST['pwd']) )
$credentials['user_password'] = $_POST['pwd'];
if ( ! empty($_POST['rememberme']) )
$credentials['remember'] = $_POST['rememberme'];
}
if ( !empty($credentials['remember']) )
$credentials['remember'] = true;
else
$credentials['remember'] = false;
// TODO do we deprecate the wp_authentication action?
do_action_ref_array('wp_authenticate', array(&$credentials['user_login'], &$credentials['user_password']));
if ( '' === $secure_cookie )
$secure_cookie = is_ssl();
$secure_cookie = apply_filters('secure_signon_cookie', $secure_cookie, $credentials);
global $auth_secure_cookie; // XXX ugly hack to pass this to wp_authenticate_cookie
$auth_secure_cookie = $secure_cookie;
add_filter('authenticate', 'wp_authenticate_cookie', 30, 3);
$user = wp_authenticate($credentials['user_login'], $credentials['user_password']);
if ( is_wp_error($user) ) {
if ( $user->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', $user->user_login, $user);
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) )
$error->add('empty_username', __('<strong>ERROR</strong>: The username field is empty.'));
if ( empty($password) )
$error->add('empty_password', __('<strong>ERROR</strong>: The password field is empty.'));
return $error;
}
$user = get_user_by('login', $username);
if ( !$user )
return new WP_Error('invalid_username', sprintf(__('<strong>ERROR</strong>: Invalid username. <a href="%s" title="Password Lost and Found">Lost your password</a>?'), wp_lostpassword_url()));
if ( is_multisite() ) {
// Is user marked as spam?
if ( 1 == $user->spam)
return new WP_Error('invalid_username', __('<strong>ERROR</strong>: Your account has been marked as a spammer.'));
// Is a user's blog marked as spam?
if ( !is_super_admin( $user->ID ) && isset($user->primary_blog) ) {
$details = get_blog_details( $user->primary_blog );
if ( is_object( $details ) && $details->spam == 1 )
return new WP_Error('blog_suspended', __('Site Suspended.'));
}
}
$user = apply_filters('wp_authenticate_user', $user, $password);
if ( is_wp_error($user) )
return $user;
if ( !wp_check_password($password, $user->user_pass, $user->ID) )
return new WP_Error( 'incorrect_password', sprintf( __( '<strong>ERROR</strong>: The password you entered for the username <strong>%1$s</strong> is incorrect. <a href="%2$s" title="Password Lost and Found">Lost your password</a>?' ),
$username, wp_lostpassword_url() ) );
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 $users Array of user IDs.
* @param string|array $post_type Optional. Post type to check. Defaults to post.
* @return array Amount of posts each user has written.
*/
function count_many_users_posts( $users, $post_type = 'post' ) {
global $wpdb;
$count = array();
if ( empty( $users ) || ! is_array( $users ) )
return $count;
$userlist = implode( ',', array_map( 'absint', $users ) );
$where = get_posts_by_author_sql( $post_type );
$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
//
/**
* Get the current user's ID
*
* @since MU
*
* @uses wp_get_current_user
*
* @return int The current user's ID
*/
function get_current_user_id() {
$user = wp_get_current_user();
return ( isset( $user->ID ) ? (int) $user->ID : 0 );
}
/**
* 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 = get_current_user_id();
if ( ! $user = get_userdata( $user ) )
return false;
if ( $user->has_prop( $wpdb->prefix . $option ) ) // Blog specific
$result = $user->get( $wpdb->prefix . $option );
elseif ( $user->has_prop( $option ) ) // User specific and cross-blog
$result = $user->get( $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 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 );
}
/**
* WordPress User Query class.
*
* @since 3.1.0
*/
class WP_User_Query {
/**
* List of found user ids
*
* @since 3.1.0
* @access private
* @var array
*/
var $results;
/**
* Total number of found users for the current query
*
* @since 3.1.0
* @access private
* @var int
*/
var $total_users = 0;
// SQL clauses
var $query_fields;
var $query_from;
var $query_where;
var $query_orderby;
var $query_limit;
/**
* PHP5 constructor
*
* @since 3.1.0
*
* @param string|array $args The query variables
* @return WP_User_Query
*/
function __construct( $query = null ) {
if ( !empty( $query ) ) {
$this->query_vars = wp_parse_args( $query, array(
'blog_id' => $GLOBALS['blog_id'],
'role' => '',
'meta_key' => '',
'meta_value' => '',
'meta_compare' => '',
'include' => array(),
'exclude' => array(),
'search' => '',
'search_columns' => array(),
'orderby' => 'login',
'order' => 'ASC',
'offset' => '',
'number' => '',
'count_total' => true,
'fields' => 'all',
'who' => ''
) );
$this->prepare_query();
$this->query();
}
}
/**
* Prepare the query variables
*
* @since 3.1.0
* @access private
*/
function prepare_query() {
global $wpdb;
$qv = &$this->query_vars;
if ( is_array( $qv['fields'] ) ) {
$qv['fields'] = array_unique( $qv['fields'] );
$this->query_fields = array();
foreach ( $qv['fields'] as $field )
$this->query_fields[] = $wpdb->users . '.' . esc_sql( $field );
$this->query_fields = implode( ',', $this->query_fields );
} elseif ( 'all' == $qv['fields'] ) {
$this->query_fields = "$wpdb->users.*";
} else {
$this->query_fields = "$wpdb->users.ID";
}
if ( $this->query_vars['count_total'] )
$this->query_fields = 'SQL_CALC_FOUND_ROWS ' . $this->query_fields;
$this->query_from = "FROM $wpdb->users";
$this->query_where = "WHERE 1=1";
// sorting
if ( in_array( $qv['orderby'], array('nicename', 'email', 'url', 'registered') ) ) {
$orderby = 'user_' . $qv['orderby'];
} elseif ( in_array( $qv['orderby'], array('user_nicename', 'user_email', 'user_url', 'user_registered') ) ) {
$orderby = $qv['orderby'];
} elseif ( 'name' == $qv['orderby'] || 'display_name' == $qv['orderby'] ) {
$orderby = 'display_name';
} elseif ( 'post_count' == $qv['orderby'] ) {
// todo: avoid the JOIN
$where = get_posts_by_author_sql('post');
$this->query_from .= " LEFT OUTER JOIN (
SELECT post_author, COUNT(*) as post_count
FROM $wpdb->posts
$where
GROUP BY post_author
) p ON ({$wpdb->users}.ID = p.post_author)
";
$orderby = 'post_count';
} elseif ( 'ID' == $qv['orderby'] || 'id' == $qv['orderby'] ) {
$orderby = 'ID';
} else {
$orderby = 'user_login';
}
$qv['order'] = strtoupper( $qv['order'] );
if ( 'ASC' == $qv['order'] )
$order = 'ASC';
else
$order = 'DESC';
$this->query_orderby = "ORDER BY $orderby $order";
// limit
if ( $qv['number'] ) {
if ( $qv['offset'] )
$this->query_limit = $wpdb->prepare("LIMIT %d, %d", $qv['offset'], $qv['number']);
else
$this->query_limit = $wpdb->prepare("LIMIT %d", $qv['number']);
}
$search = trim( $qv['search'] );
if ( $search ) {
$leading_wild = ( ltrim($search, '*') != $search );
$trailing_wild = ( rtrim($search, '*') != $search );
if ( $leading_wild && $trailing_wild )
$wild = 'both';
elseif ( $leading_wild )
$wild = 'leading';
elseif ( $trailing_wild )
$wild = 'trailing';
else
$wild = false;
if ( $wild )
$search = trim($search, '*');
$search_columns = array();
if ( $qv['search_columns'] )
$search_columns = array_intersect( $qv['search_columns'], array( 'ID', 'user_login', 'user_email', 'user_url', 'user_nicename' ) );
if ( ! $search_columns ) {
if ( false !== strpos( $search, '@') )
$search_columns = array('user_email');
elseif ( is_numeric($search) )
$search_columns = array('user_login', 'ID');
elseif ( preg_match('|^https?://|', $search) && ! wp_is_large_network( 'users' ) )
$search_columns = array('user_url');
else
$search_columns = array('user_login', 'user_nicename');
}
$this->query_where .= $this->get_search_sql( $search, $search_columns, $wild );
}
$blog_id = absint( $qv['blog_id'] );
if ( 'authors' == $qv['who'] && $blog_id ) {
$qv['meta_key'] = $wpdb->get_blog_prefix( $blog_id ) . 'user_level';
$qv['meta_value'] = 0;
$qv['meta_compare'] = '!=';
$qv['blog_id'] = $blog_id = 0; // Prevent extra meta query
}
$role = trim( $qv['role'] );
if ( $blog_id && ( $role || is_multisite() ) ) {
$cap_meta_query = array();
$cap_meta_query['key'] = $wpdb->get_blog_prefix( $blog_id ) . 'capabilities';
if ( $role ) {
$cap_meta_query['value'] = '"' . $role . '"';
$cap_meta_query['compare'] = 'like';
}
$qv['meta_query'][] = $cap_meta_query;
}
$meta_query = new WP_Meta_Query();
$meta_query->parse_query_vars( $qv );
if ( !empty( $meta_query->queries ) ) {
$clauses = $meta_query->get_sql( 'user', $wpdb->users, 'ID', $this );
$this->query_from .= $clauses['join'];
$this->query_where .= $clauses['where'];
if ( 'OR' == $meta_query->relation )
$this->query_fields = 'DISTINCT ' . $this->query_fields;
}
if ( !empty( $qv['include'] ) ) {
$ids = implode( ',', wp_parse_id_list( $qv['include'] ) );
$this->query_where .= " AND $wpdb->users.ID IN ($ids)";
} elseif ( !empty($qv['exclude']) ) {
$ids = implode( ',', wp_parse_id_list( $qv['exclude'] ) );
$this->query_where .= " AND $wpdb->users.ID NOT IN ($ids)";
}
do_action_ref_array( 'pre_user_query', array( &$this ) );
}
/**
* Execute the query, with the current variables
*
* @since 3.1.0
* @access private
*/
function query() {
global $wpdb;
if ( is_array( $this->query_vars['fields'] ) || 'all' == $this->query_vars['fields'] ) {
$this->results = $wpdb->get_results("SELECT $this->query_fields $this->query_from $this->query_where $this->query_orderby $this->query_limit");
} else {
$this->results = $wpdb->get_col("SELECT $this->query_fields $this->query_from $this->query_where $this->query_orderby $this->query_limit");
}
if ( $this->query_vars['count_total'] )
$this->total_users = $wpdb->get_var( apply_filters( 'found_users_query', 'SELECT FOUND_ROWS()' ) );
if ( !$this->results )
return;
if ( 'all_with_meta' == $this->query_vars['fields'] ) {
cache_users( $this->results );
$r = array();
foreach ( $this->results as $userid )
$r[ $userid ] = new WP_User( $userid, '', $this->query_vars['blog_id'] );
$this->results = $r;
}
}
/*
* Used internally to generate an SQL string for searching across multiple columns
*
* @access protected
* @since 3.1.0
*
* @param string $string
* @param array $cols
* @param bool $wild Whether to allow wildcard searches. Default is false for Network Admin, true for
* single site. Single site allows leading and trailing wildcards, Network Admin only trailing.
* @return string
*/
function get_search_sql( $string, $cols, $wild = false ) {
$string = esc_sql( $string );
$searches = array();
$leading_wild = ( 'leading' == $wild || 'both' == $wild ) ? '%' : '';
$trailing_wild = ( 'trailing' == $wild || 'both' == $wild ) ? '%' : '';
foreach ( $cols as $col ) {
if ( 'ID' == $col )
$searches[] = "$col = '$string'";
else
$searches[] = "$col LIKE '$leading_wild" . like_escape($string) . "$trailing_wild'";
}
return ' AND (' . implode(' OR ', $searches) . ')';
}
/**
* Return the list of users
*
* @since 3.1.0
* @access public
*
* @return array
*/
function get_results() {
return $this->results;
}
/**
* Return the total number of users for the current query
*
* @since 3.1.0
* @access public
*
* @return array
*/
function get_total() {
return $this->total_users;
}
}
/**
* Retrieve list of users matching criteria.
*
* @since 3.1.0
* @uses $wpdb
* @uses WP_User_Query See for default arguments and information.
*
* @param array $args Optional.
* @return array List of users.
*/
function get_users( $args = array() ) {
$args = wp_parse_args( $args );
$args['count_total'] = false;
$user_search = new WP_User_Query($args);
return (array) $user_search->get_results();
}
/**
* Get the blogs a user belongs to.
*
* @since 3.0.0
*
* @param int $user_id User ID
* @param bool $all Whether to retrieve all blogs, or only blogs that are not marked as deleted, archived, or spam.
* @return array A list of the user's blogs. An empty array if the user doesn't exist or belongs to no blogs.
*/
function get_blogs_of_user( $user_id, $all = false ) {
global $wpdb;
$user_id = (int) $user_id;
// Logged out users can't have blogs
if ( empty( $user_id ) )
return array();
$keys = get_user_meta( $user_id );
if ( empty( $keys ) )
return array();
if ( ! is_multisite() ) {
$blog_id = get_current_blog_id();
$blogs = array( $blog_id => new stdClass );
$blogs[ $blog_id ]->userblog_id = $blog_id;
$blogs[ $blog_id ]->blogname = get_option('blogname');
$blogs[ $blog_id ]->domain = '';
$blogs[ $blog_id ]->path = '';
$blogs[ $blog_id ]->site_id = 1;
$blogs[ $blog_id ]->siteurl = get_option('siteurl');
return $blogs;
}
$blogs = array();
if ( isset( $keys[ $wpdb->base_prefix . 'capabilities' ] ) && defined( 'MULTISITE' ) ) {
$blog = get_blog_details( 1 );
if ( $blog && isset( $blog->domain ) && ( $all || ( ! $blog->archived && ! $blog->spam && ! $blog->deleted ) ) ) {
$blogs[ 1 ] = (object) array(
'userblog_id' => 1,
'blogname' => $blog->blogname,
'domain' => $blog->domain,
'path' => $blog->path,
'site_id' => $blog->site_id,
'siteurl' => $blog->siteurl,
);
}
unset( $keys[ $wpdb->base_prefix . 'capabilities' ] );
}
$keys = array_keys( $keys );
foreach ( $keys as $key ) {
if ( 'capabilities' !== substr( $key, -12 ) )
continue;
if ( $wpdb->base_prefix && 0 !== strpos( $key, $wpdb->base_prefix ) )
continue;
$blog_id = str_replace( array( $wpdb->base_prefix, '_capabilities' ), '', $key );
if ( ! is_numeric( $blog_id ) )
continue;
$blog_id = (int) $blog_id;
$blog = get_blog_details( $blog_id );
if ( $blog && isset( $blog->domain ) && ( $all || ( ! $blog->archived && ! $blog->spam && ! $blog->deleted ) ) ) {
$blogs[ $blog_id ] = (object) array(
'userblog_id' => $blog_id,
'blogname' => $blog->blogname,
'domain' => $blog->domain,
'path' => $blog->path,
'site_id' => $blog->site_id,
'siteurl' => $blog->siteurl,
);
}
}
return apply_filters( 'get_blogs_of_user', $blogs, $user_id, $all );
}
/**
* Find out whether a user is a member of a given blog.
*
* @since MU 1.1
* @uses get_blogs_of_user()
*
* @param int $user_id Optional. The unique ID of the user. Defaults to the current user.
* @param int $blog_id Optional. ID of the blog to check. Defaults to the current site.
* @return bool
*/
function is_user_member_of_blog( $user_id = 0, $blog_id = 0 ) {
$user_id = (int) $user_id;
$blog_id = (int) $blog_id;
if ( empty( $user_id ) )
$user_id = get_current_user_id();
if ( empty( $blog_id ) )
$blog_id = get_current_blog_id();
$blogs = get_blogs_of_user( $user_id );
return array_key_exists( $blog_id, $blogs );
}
/**
* Add meta data field to a user.
*
* Post meta data is called "Custom Fields" on the Administration Screens.
*
* @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 $meta_key Metadata name.
* @param mixed $meta_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 Optional. The meta key to retrieve. By default, returns data for all keys.
* @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 $meta_key Metadata key.
* @param mixed $meta_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_Query::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, $wp_roles;
// Initialize
$id = get_current_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 ) {
$b_roles = maybe_unserialize($caps_meta);
if ( ! is_array( $b_roles ) )
continue;
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_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_identity;
if ( '' == $for_user_id )
$for_user_id = get_current_user_id();
$user = get_userdata( $for_user_id );
if ( ! $user ) {
$user_ID = 0;
$user_level = 0;
$userdata = null;
$user_login = $user_email = $user_url = $user_identity = '';
return;
}
$user_ID = (int) $user->ID;
$user_level = (int) $user->user_level;
$userdata = $user;
$user_login = $user->user_login;
$user_email = $user->user_email;
$user_url = $user->user_url;
$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:
* <ol>
* <li>show_option_all - Text to show all and whether HTML option exists.</li>
* <li>show_option_none - Text for show none and whether HTML option exists.</li>
* <li>hide_if_only_one_author - Don't create the dropdown if there is only one user.</li>
* <li>orderby - SQL order by clause for what order the users appear. Default is 'display_name'.</li>
* <li>order - Default is 'ASC'. Can also be 'DESC'.</li>
* <li>include - User IDs to include.</li>
* <li>exclude - User IDs to exclude.</li>
* <li>multi - Default is 'false'. Whether to skip the ID attribute on the 'select' element. A 'true' value is overridden when id argument is set.</li>
* <li>show - Default is 'display_name'. User table column to display. If the selected item is empty then the user_login will be displayed in parentheses</li>
* <li>echo - Default is '1'. Whether to display or retrieve content.</li>
* <li>selected - Which User ID is selected.</li>
* <li>include_selected - Always include the selected user ID in the dropdown. Default is false.</li>
* <li>name - Default is 'user'. Name attribute of select element.</li>
* <li>id - Default is the value of the 'name' parameter. ID attribute of select element.</li>
* <li>class - Class attribute of select element.</li>
* <li>blog_id - ID of blog (Multisite only). Defaults to ID of current blog.</li>
* <li>who - Which users to query. Currently only 'authors' is supported. Default is all users.</li>
* </ol>
*
* @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 = '' ) {
$defaults = array(
'show_option_all' => '', 'show_option_none' => '', 'hide_if_only_one_author' => '',
'orderby' => 'display_name', 'order' => 'ASC',
'include' => '', 'exclude' => '', 'multi' => 0,
'show' => 'display_name', 'echo' => 1,
'selected' => 0, 'name' => 'user', 'class' => '', 'id' => '',
'blog_id' => $GLOBALS['blog_id'], 'who' => '', 'include_selected' => false
);
$defaults['selected'] = is_author() ? get_query_var( 'author' ) : 0;
$r = wp_parse_args( $args, $defaults );
extract( $r, EXTR_SKIP );
$query_args = wp_array_slice_assoc( $r, array( 'blog_id', 'include', 'exclude', 'orderby', 'order', 'who' ) );
$query_args['fields'] = array( 'ID', $show );
$users = get_users( $query_args );