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< ? php
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/**
* 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 .
*/
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function wp_signon ( $credentials = '' , $secure_cookie = '' ) {
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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 ;
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// TODO do we deprecate the wp_authentication action?
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do_action_ref_array ( 'wp_authenticate' , array ( & $credentials [ 'user_login' ], & $credentials [ 'user_password' ]));
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if ( '' === $secure_cookie )
$secure_cookie = is_ssl () ? true : false ;
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global $auth_secure_cookie ; // XXX ugly hack to pass this to wp_authenticate_cookie
$auth_secure_cookie = $secure_cookie ;
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add_filter ( 'authenticate' , 'wp_authenticate_cookie' , 30 , 3 );
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$user = wp_authenticate ( $credentials [ 'user_login' ], $credentials [ 'user_password' ]);
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if ( is_wp_error ( $user ) ) {
if ( $user -> get_error_codes () == array ( 'empty_username' , 'empty_password' ) ) {
$user = new WP_Error ( '' , '' );
}
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return $user ;
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}
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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 ( $password ) ) {
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$error = new WP_Error ();
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if ( empty ( $username ) )
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$error -> add ( 'empty_username' , __ ( '<strong>ERROR</strong>: The username field is empty.' ));
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if ( empty ( $password ) )
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$error -> add ( 'empty_password' , __ ( '<strong>ERROR</strong>: The password field is empty.' ));
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return $error ;
}
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$userdata = get_user_by ( 'login' , $username );
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if ( ! $userdata )
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return new WP_Error ( 'invalid_username' , sprintf ( __ ( '<strong>ERROR</strong>: Invalid username. <a href="%s" title="Password Lost and Found">Lost your password</a>?' ), site_url ( 'wp-login.php?action=lostpassword' , 'login' )));
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if ( is_multisite () ) {
// Is user marked as spam?
if ( 1 == $userdata -> 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 ( $userdata -> ID ) && isset ( $userdata -> primary_blog ) ) {
$details = get_blog_details ( $userdata -> primary_blog );
if ( is_object ( $details ) && $details -> spam == 1 )
return new WP_Error ( 'blog_suspended' , __ ( 'Blog Suspended.' ));
}
}
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$userdata = apply_filters ( 'wp_authenticate_user' , $userdata , $password );
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if ( is_wp_error ( $userdata ) )
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return $userdata ;
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if ( ! wp_check_password ( $password , $userdata -> user_pass , $userdata -> ID ) )
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return new WP_Error ( 'incorrect_password' , sprintf ( __ ( '<strong>ERROR</strong>: Incorrect password. <a href="%s" title="Password Lost and Found">Lost your password</a>?' ), site_url ( 'wp-login.php?action=lostpassword' , 'login' )));
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$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.
}
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return $user ;
}
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/**
* 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 .
*/
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function get_usernumposts ( $userid ) {
global $wpdb ;
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$userid = ( int ) $userid ;
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$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 );
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}
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/**
* 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 , $user_pass ) {
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$user = wp_authenticate ( $user_login , $user_pass );
if ( is_wp_error ( $user ) )
return false ;
return true ;
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}
//
// User option functions
//
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/**
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* Retrieve user option that can be either per Site or per Network .
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*
* 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 .
*
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* The option will first check for the per site name and then the per Network name .
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*
* @ 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 .
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* @ param bool $deprecated Use get_option () to check for an option in the options table .
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* @ return mixed
*/
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function get_user_option ( $option , $user = 0 , $deprecated = '' ) {
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global $wpdb ;
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if ( ! empty ( $deprecated ) )
_deprecated_argument ( __FUNCTION__ , '3.0' );
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if ( empty ( $user ) )
$user = wp_get_current_user ();
else
$user = get_userdata ( $user );
if ( isset ( $user -> { $wpdb -> prefix . $option } ) ) // Blog specific
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$result = $user -> { $wpdb -> prefix . $option };
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elseif ( isset ( $user -> { $option } ) ) // User specific and cross-blog
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$result = $user -> { $option };
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else
$result = false ;
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return apply_filters ( " get_user_option_ { $option } " , $result , $option , $user );
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}
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/**
* Update user option with global blog capability .
*
* User options are just like user metadata except that they have support for
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* global blog options . If the 'global' parameter is false , which it is by default
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* 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 .
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* @ param bool $global Optional . Whether option name is blog specific .
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* @ return unknown
*/
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function update_user_option ( $user_id , $option_name , $newvalue , $global = false ) {
global $wpdb ;
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if ( ! $global )
$option_name = $wpdb -> prefix . $option_name ;
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return update_user_meta ( $user_id , $option_name , $newvalue );
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}
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/**
* 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
*/
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function get_users_of_blog ( $id = '' ) {
global $wpdb , $blog_id ;
if ( empty ( $id ) )
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$id = ( int ) $blog_id ;
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$blog_prefix = $wpdb -> get_blog_prefix ( $id );
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$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 " );
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return $users ;
}
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/**
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* Add meta data field to a user .
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*
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* 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
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*
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* @ 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 .
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*/
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function add_user_meta ( $user_id , $meta_key , $meta_value , $unique = false ) {
return add_metadata ( 'user' , $user_id , $meta_key , $meta_value , $unique );
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}
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/**
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* Remove metadata matching criteria from a user .
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*
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* 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 .
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*
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* @ since 3.0 . 0
* @ uses delete_metadata ()
* @ link http :// codex . wordpress . org / Function_Reference / delete_user_meta
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*
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* @ 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 .
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*/
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function delete_user_meta ( $user_id , $meta_key , $meta_value = '' ) {
return delete_metadata ( 'user' , $user_id , $meta_key , $meta_value );
}
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/**
* 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 );
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}
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/**
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* Update user meta field based on user ID .
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*
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* Use the $prev_value parameter to differentiate between meta fields with the
* same key and user ID .
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*
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* If the meta field for the user does not exist , it will be added .
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*
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* @ since 3.0
* @ uses update_metadata
* @ link http :// codex . wordpress . org / Function_Reference / update_user_meta
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*
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* @ 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 .
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*/
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function update_user_meta ( $user_id , $meta_key , $meta_value , $prev_value = '' ) {
return update_metadata ( 'user' , $user_id , $meta_key , $meta_value , $prev_value );
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}
//
// Private helper functions
//
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/**
* 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
*
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* @ param int $for_user_id Optional . User ID to setup global data .
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*/
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function setup_userdata ( $for_user_id = '' ) {
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global $user_login , $userdata , $user_level , $user_ID , $user_email , $user_url , $user_pass_md5 , $user_identity ;
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if ( '' == $for_user_id )
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$user = wp_get_current_user ();
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else
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$user = new WP_User ( $for_user_id );
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if ( 0 == $user -> ID )
return ;
$userdata = $user -> data ;
$user_login = $user -> user_login ;
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$user_level = ( int ) isset ( $user -> user_level ) ? $user -> user_level : 0 ;
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$user_ID = ( int ) $user -> ID ;
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$user_email = $user -> user_email ;
$user_url = $user -> user_url ;
$user_pass_md5 = md5 ( $user -> user_pass );
$user_identity = $user -> display_name ;
}
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/**
* 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 > 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 >
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* < 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 >
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* < 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 parentesis </ li >
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* < li > echo - Default is '1' . Whether to display or retrieve content .</ li >
* < li > selected - Which User ID is selected .</ li >
* < li > name - Default is 'user' . Name attribute of select element .</ li >
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* < li > id - Default is the value of the 'name' parameter . ID attribute of select element .</ li >
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* < li > class - Class attribute of select element .</ li >
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* < li > blog_id - ID of blog ( Multisite only ) . Defaults to ID of current blog .</ li >
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* </ 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 .
*/
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function wp_dropdown_users ( $args = '' ) {
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global $wpdb ;
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$defaults = array (
'show_option_all' => '' , 'show_option_none' => '' ,
'orderby' => 'display_name' , 'order' => 'ASC' ,
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'include' => '' , 'exclude' => '' , 'multi' => 0 ,
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'show' => 'display_name' , 'echo' => 1 ,
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'selected' => 0 , 'name' => 'user' , 'class' => '' , 'blog_id' => $GLOBALS [ 'blog_id' ],
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'id' => '' ,
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);
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$defaults [ 'selected' ] = is_author () ? get_query_var ( 'author' ) : 0 ;
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$r = wp_parse_args ( $args , $defaults );
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extract ( $r , EXTR_SKIP );
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$blog_prefix = $wpdb -> get_blog_prefix ( $blog_id );
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$query = " SELECT { $wpdb -> users } .* FROM $wpdb->users , $wpdb->usermeta WHERE { $wpdb -> users } .ID = { $wpdb -> usermeta } .user_id AND meta_key = ' { $blog_prefix } capabilities' " ;
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$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 ( $query_where )
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$query .= " AND " . join ( ' AND' , $query_where );
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$query .= " ORDER BY $orderby $order " ;
$users = $wpdb -> get_results ( $query );
$output = '' ;
if ( ! empty ( $users ) ) {
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$name = esc_attr ( $name );
if ( $multi && ! $id )
$id = '' ;
else
$id = $id ? " id=' " . esc_attr ( $id ) . " ' " : " id=' $name ' " ;
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$output = " <select name=' { $name } ' { $id } class=' $class '> \n " ;
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if ( $show_option_all )
$output .= " \t <option value='0'> $show_option_all </option> \n " ;
if ( $show_option_none )
$output .= " \t <option value='-1'> $show_option_none </option> \n " ;
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foreach ( ( array ) $users as $user ) {
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$user -> ID = ( int ) $user -> ID ;
$_selected = $user -> ID == $selected ? " selected='selected' " : '' ;
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$display = ! empty ( $user -> $show ) ? $user -> $show : '(' . $user -> user_login . ')' ;
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$output .= " \t <option value=' $user->ID ' $_selected > " . esc_html ( $display ) . " </option> \n " ;
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}
$output .= " </select> " ;
}
$output = apply_filters ( 'wp_dropdown_users' , $output );
if ( $echo )
echo $output ;
return $output ;
}
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/**
* 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 .
*/
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function _fill_user ( & $user ) {
global $wpdb ;
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$show = $wpdb -> hide_errors ();
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$metavalues = $wpdb -> get_results ( $wpdb -> prepare ( " SELECT meta_key, meta_value FROM $wpdb->usermeta WHERE user_id = %d " , $user -> ID ));
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$wpdb -> show_errors ( $show );
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if ( $metavalues ) {
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foreach ( ( array ) $metavalues as $meta ) {
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$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' );
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wp_cache_add ( $user -> user_nicename , $user -> ID , 'userslugs' );
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}
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/**
* 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 ) {
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if ( is_string ( $user -> $field ) || is_numeric ( $user -> $field ) )
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$user -> $field = sanitize_user_field ( $field , $user -> $field , $user -> ID , $context );
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}
$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 ;
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if ( ! is_string ( $value ) && ! is_numeric ( $value ) )
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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 ;
}
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/**
* Clean all user caches
*
* @ since 3.0
*
* @ param int $id User ID
* @ return void
*/
function clean_user_cache ( $id ) {
$user = new WP_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' );
}
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?>