756 lines
24 KiB
PHP
756 lines
24 KiB
PHP
<?php
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/**
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* WordPress User API
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*
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* @package WordPress
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*/
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/**
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* Authenticate user with remember capability.
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*
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* The credentials is an array that has 'user_login', 'user_password', and
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* 'remember' indices. If the credentials is not given, then the log in form
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* will be assumed and used if set.
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*
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* The various authentication cookies will be set by this function and will be
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* set for a longer period depending on if the 'remember' credential is set to
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* true.
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*
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* @since 2.5.0
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*
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* @param array $credentials Optional. User info in order to sign on.
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* @param bool $secure_cookie Optional. Whether to use secure cookie.
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* @return object Either WP_Error on failure, or WP_User on success.
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*/
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function wp_signon( $credentials = '', $secure_cookie = '' ) {
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if ( empty($credentials) ) {
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if ( ! empty($_POST['log']) )
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$credentials['user_login'] = $_POST['log'];
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if ( ! empty($_POST['pwd']) )
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$credentials['user_password'] = $_POST['pwd'];
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if ( ! empty($_POST['rememberme']) )
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$credentials['remember'] = $_POST['rememberme'];
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}
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if ( !empty($credentials['remember']) )
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$credentials['remember'] = true;
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else
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$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 ( '' === $secure_cookie )
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$secure_cookie = is_ssl() ? true : false;
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global $auth_secure_cookie; // XXX ugly hack to pass this to wp_authenticate_cookie
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$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) ) {
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if ( $user->get_error_codes() == array('empty_username', 'empty_password') ) {
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$user = new WP_Error('', '');
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}
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return $user;
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}
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wp_set_auth_cookie($user->ID, $credentials['remember'], $secure_cookie);
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do_action('wp_login', $credentials['user_login']);
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return $user;
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}
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/**
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* Authenticate the user using the username and password.
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*/
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add_filter('authenticate', 'wp_authenticate_username_password', 20, 3);
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function wp_authenticate_username_password($user, $username, $password) {
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if ( is_a($user, 'WP_User') ) { return $user; }
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if ( empty($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 $error;
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}
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$userdata = get_userdatabylogin($username);
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if ( !$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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}
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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 $userdata;
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}
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if ( !wp_check_password($password, $userdata->user_pass, $userdata->ID) ) {
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return new WP_Error('incorrect_password', sprintf(__('<strong>ERROR</strong>: Incorrect password. <a href="%s" title="Password Lost and Found">Lost your password</a>?'), site_url('wp-login.php?action=lostpassword', 'login')));
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}
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$user = new WP_User($userdata->ID);
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return $user;
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}
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/**
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* Authenticate the user using the WordPress auth cookie.
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*/
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function wp_authenticate_cookie($user, $username, $password) {
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if ( is_a($user, 'WP_User') ) { return $user; }
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if ( empty($username) && empty($password) ) {
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$user_id = wp_validate_auth_cookie();
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if ( $user_id )
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return new WP_User($user_id);
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global $auth_secure_cookie;
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if ( $auth_secure_cookie )
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$auth_cookie = SECURE_AUTH_COOKIE;
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else
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$auth_cookie = AUTH_COOKIE;
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if ( !empty($_COOKIE[$auth_cookie]) )
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return new WP_Error('expired_session', __('Please log in again.'));
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// If the cookie is not set, be silent.
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}
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return $user;
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}
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/**
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* Retrieve user data based on field.
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*
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* Use get_profile() will make a database query to get the value of the table
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* column. The value might be cached using the query cache, but care should be
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* taken when using the function to not make a lot of queries for retrieving
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* user profile information.
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*
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* If the $user parameter is not used, then the user will be retrieved from a
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* cookie of the user. Therefore, if the cookie does not exist, then no value
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* might be returned. Sanity checking must be done to ensure that when using
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* get_profile() that empty/null/false values are handled and that something is
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* at least displayed.
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*
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* @since 1.5.0
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* @uses $wpdb WordPress database object to create queries.
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*
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* @param string $field User field to retrieve.
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* @param string $user Optional. User username.
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* @return string The value in the field.
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*/
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function get_profile($field, $user = false) {
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global $wpdb;
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if ( !$user )
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$user = esc_sql( $_COOKIE[USER_COOKIE] );
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return $wpdb->get_var( $wpdb->prepare("SELECT $field FROM $wpdb->users WHERE user_login = %s", $user) );
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}
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/**
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* Number of posts user has written.
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*
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* @since 0.71
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* @uses $wpdb WordPress database object for queries.
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*
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* @param int $userid User ID.
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* @return int Amount of posts user has written.
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*/
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function get_usernumposts($userid) {
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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'));
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return apply_filters('get_usernumposts', $count, $userid);
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}
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/**
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* Check that the user login name and password is correct.
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*
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* @since 0.71
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* @todo xmlrpc only. Maybe move to xmlrpc.php.
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*
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* @param string $user_login User name.
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* @param string $user_pass User password.
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* @return bool False if does not authenticate, true if username and password authenticates.
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*/
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function user_pass_ok($user_login, $user_pass) {
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$user = wp_authenticate($user_login, $user_pass);
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if ( is_wp_error($user) )
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return false;
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return true;
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}
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//
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// User option functions
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//
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/**
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* Retrieve user option that can be either global, user, or blog.
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*
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* If the user ID is not given, then the current user will be used instead. If
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* the user ID is given, then the user data will be retrieved. The filter for
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* the result, will also pass the original option name and finally the user data
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* object as the third parameter.
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*
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* The option will first check for the non-global name, then the global name,
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* and if it still doesn't find it, it will try the blog option. The option can
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* either be modified or set by a plugin.
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*
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* @since 2.0.0
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* @uses $wpdb WordPress database object for queries.
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* @uses apply_filters() Calls 'get_user_option_$option' hook with result,
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* option parameter, and user data object.
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*
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* @param string $option User option name.
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* @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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*/
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function get_user_option( $option, $user = 0, $deprecated = '' ) {
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global $wpdb;
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if ( !empty( $deprecated ) )
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_deprecated_argument( __FUNCTION__, '3.0' );
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$option = preg_replace('|[^a-z0-9_]|i', '', $option);
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if ( empty($user) )
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$user = wp_get_current_user();
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else
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$user = get_userdata($user);
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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
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$result = false;
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return apply_filters("get_user_option_{$option}", $result, $option, $user);
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}
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/**
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* Update user option with global blog capability.
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*
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* 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.
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*
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* @since 2.0.0
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* @uses $wpdb WordPress database object for queries
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*
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* @param int $user_id User ID
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* @param string $option_name User option name.
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* @param mixed $newvalue User option value.
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* @param bool $global Optional. Whether option name is blog specific or not.
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* @return unknown
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*/
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function update_user_option( $user_id, $option_name, $newvalue, $global = false ) {
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global $wpdb;
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if ( !$global )
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$option_name = $wpdb->prefix . $option_name;
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return update_usermeta( $user_id, $option_name, $newvalue );
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}
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/**
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* Get users for the blog.
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*
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* For setups that use the multi-blog feature. Can be used outside of the
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* multi-blog feature.
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*
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* @since 2.2.0
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* @uses $wpdb WordPress database object for queries
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* @uses $blog_id The Blog id of the blog for those that use more than one blog
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*
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* @param int $id Blog ID.
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* @return array List of users that are part of that Blog ID
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*/
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function get_users_of_blog( $id = '' ) {
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global $wpdb, $blog_id;
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if ( empty($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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//
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// User meta functions
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//
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/**
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* Remove user meta data.
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*
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* @since 2.0.0
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* @uses $wpdb WordPress database object for queries.
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*
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* @param int $user_id User ID.
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* @param string $meta_key Metadata key.
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* @param mixed $meta_value Metadata value.
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* @return bool True deletion completed and false if user_id is not a number.
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*/
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function delete_usermeta( $user_id, $meta_key, $meta_value = '' ) {
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global $wpdb;
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if ( !is_numeric( $user_id ) )
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return false;
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$meta_key = preg_replace('|[^a-z0-9_]|i', '', $meta_key);
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if ( is_array($meta_value) || is_object($meta_value) )
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$meta_value = serialize($meta_value);
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$meta_value = trim( $meta_value );
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$cur = $wpdb->get_row( $wpdb->prepare("SELECT * FROM $wpdb->usermeta WHERE user_id = %d AND meta_key = %s", $user_id, $meta_key) );
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if ( $cur && $cur->umeta_id )
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do_action( 'delete_usermeta', $cur->umeta_id, $user_id, $meta_key, $meta_value );
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if ( ! empty($meta_value) )
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$wpdb->query( $wpdb->prepare("DELETE FROM $wpdb->usermeta WHERE user_id = %d AND meta_key = %s AND meta_value = %s", $user_id, $meta_key, $meta_value) );
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else
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$wpdb->query( $wpdb->prepare("DELETE FROM $wpdb->usermeta WHERE user_id = %d AND meta_key = %s", $user_id, $meta_key) );
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wp_cache_delete($user_id, 'users');
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if ( $cur && $cur->umeta_id )
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do_action( 'deleted_usermeta', $cur->umeta_id, $user_id, $meta_key, $meta_value );
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return true;
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}
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/**
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* Retrieve user metadata.
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*
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* If $user_id is not a number, then the function will fail over with a 'false'
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* boolean return value. Other returned values depend on whether there is only
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* one item to be returned, which be that single item type. If there is more
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* than one metadata value, then it will be list of metadata values.
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*
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* @since 2.0.0
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* @uses $wpdb WordPress database object for queries.
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*
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* @param int $user_id User ID
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* @param string $meta_key Optional. Metadata key.
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* @return mixed
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*/
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function get_usermeta( $user_id, $meta_key = '') {
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global $wpdb;
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$user_id = (int) $user_id;
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if ( !$user_id )
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return false;
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if ( !empty($meta_key) ) {
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$meta_key = preg_replace('|[^a-z0-9_]|i', '', $meta_key);
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$user = wp_cache_get($user_id, 'users');
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// Check the cached user object
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if ( false !== $user && isset($user->$meta_key) )
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$metas = array($user->$meta_key);
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else
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$metas = $wpdb->get_col( $wpdb->prepare("SELECT meta_value FROM $wpdb->usermeta WHERE user_id = %d AND meta_key = %s", $user_id, $meta_key) );
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} else {
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$metas = $wpdb->get_col( $wpdb->prepare("SELECT meta_value FROM $wpdb->usermeta WHERE user_id = %d", $user_id) );
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}
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if ( empty($metas) ) {
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if ( empty($meta_key) )
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return array();
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else
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return '';
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}
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$metas = array_map('maybe_unserialize', $metas);
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if ( count($metas) == 1 )
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return $metas[0];
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else
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return $metas;
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}
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/**
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* Update metadata of user.
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*
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* There is no need to serialize values, they will be serialized if it is
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* needed. The metadata key can only be a string with underscores. All else will
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* be removed.
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*
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* Will remove the metadata, if the meta value is empty.
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*
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* @since 2.0.0
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* @uses $wpdb WordPress database object for queries
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*
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* @param int $user_id User ID
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* @param string $meta_key Metadata key.
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* @param mixed $meta_value Metadata value.
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* @return bool True on successful update, false on failure.
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*/
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function update_usermeta( $user_id, $meta_key, $meta_value ) {
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global $wpdb;
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if ( !is_numeric( $user_id ) )
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return false;
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$meta_key = preg_replace('|[^a-z0-9_]|i', '', $meta_key);
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/** @todo Might need fix because usermeta data is assumed to be already escaped */
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if ( is_string($meta_value) )
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$meta_value = stripslashes($meta_value);
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$meta_value = maybe_serialize($meta_value);
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if (empty($meta_value)) {
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return delete_usermeta($user_id, $meta_key);
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}
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$cur = $wpdb->get_row( $wpdb->prepare("SELECT * FROM $wpdb->usermeta WHERE user_id = %d AND meta_key = %s", $user_id, $meta_key) );
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if ( $cur )
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do_action( 'update_usermeta', $cur->umeta_id, $user_id, $meta_key, $meta_value );
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if ( !$cur )
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$wpdb->insert($wpdb->usermeta, compact('user_id', 'meta_key', 'meta_value') );
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else if ( $cur->meta_value != $meta_value )
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$wpdb->update($wpdb->usermeta, compact('meta_value'), compact('user_id', 'meta_key') );
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else
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return false;
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wp_cache_delete($user_id, 'users');
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if ( !$cur )
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do_action( 'added_usermeta', $wpdb->insert_id, $user_id, $meta_key, $meta_value );
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else
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do_action( 'updated_usermeta', $cur->umeta_id, $user_id, $meta_key, $meta_value );
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return true;
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}
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//
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// Private helper functions
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//
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/**
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* Setup global user vars.
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*
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* Used by set_current_user() for back compat. Might be deprecated in the
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* future.
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*
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* @since 2.0.4
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* @global string $userdata User description.
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* @global string $user_login The user username for logging in
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* @global int $user_level The level of the user
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* @global int $user_ID The ID of the user
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* @global string $user_email The email address of the user
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* @global string $user_url The url in the user's profile
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* @global string $user_pass_md5 MD5 of the user's password
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* @global string $user_identity The display name of the user
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*
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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 == $user->ID )
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return;
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$userdata = $user->data;
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$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 = $user->user_email;
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$user_url = $user->user_url;
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$user_pass_md5 = md5($user->user_pass);
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$user_identity = $user->display_name;
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}
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/**
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* Create dropdown HTML content of users.
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*
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* The content can either be displayed, which it is by default or retrieved by
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* setting the 'echo' argument. The 'include' and 'exclude' arguments do not
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* need to be used; all users will be displayed in that case. Only one can be
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* used, either 'include' or 'exclude', but not both.
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*
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* The available arguments are as follows:
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* <ol>
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* <li>show_option_all - Text to show all and whether HTML option exists.</li>
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* <li>show_option_none - Text for show none and whether HTML option exists.
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* </li>
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* <li>orderby - SQL order by clause for what order the users appear. Default is
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* 'display_name'.</li>
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* <li>order - Default is 'ASC'. Can also be 'DESC'.</li>
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* <li>include - User IDs to include.</li>
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* <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.</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>
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* <li>selected - Which User ID is selected.</li>
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* <li>name - Default is 'user'. Name attribute of select element.</li>
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* <li>class - Class attribute of select element.</li>
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* </ol>
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*
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* @since 2.3.0
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* @uses $wpdb WordPress database object for queries
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*
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* @param string|array $args Optional. Override defaults.
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* @return string|null Null on display. String of HTML content on retrieve.
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*/
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function wp_dropdown_users( $args = '' ) {
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global $wpdb;
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$defaults = array(
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'show_option_all' => '', 'show_option_none' => '',
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'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' => ''
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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( $r, EXTR_SKIP );
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$query = "SELECT * FROM $wpdb->users";
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$query_where = array();
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if ( is_array($include) )
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$include = join(',', $include);
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$include = preg_replace('/[^0-9,]/', '', $include); // (int)
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if ( $include )
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$query_where[] = "ID IN ($include)";
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if ( is_array($exclude) )
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$exclude = join(',', $exclude);
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$exclude = preg_replace('/[^0-9,]/', '', $exclude); // (int)
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if ( $exclude )
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$query_where[] = "ID NOT IN ($exclude)";
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if ( $query_where )
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$query .= " WHERE " . join(' AND', $query_where);
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$query .= " ORDER BY $orderby $order";
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$users = $wpdb->get_results( $query );
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$output = '';
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if ( !empty($users) ) {
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$id = $multi ? "" : "id='$name'";
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$output = "<select name='$name' $id class='$class'>\n";
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if ( $show_option_all )
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$output .= "\t<option value='0'>$show_option_all</option>\n";
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if ( $show_option_none )
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$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) $user->ID;
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$_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($display) . "</option>\n";
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}
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$output .= "</select>";
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}
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$output = apply_filters('wp_dropdown_users', $output);
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if ( $echo )
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echo $output;
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return $output;
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}
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/**
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* Add user meta data as properties to given user object.
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*
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* The finished user data is cached, but the cache is not used to fill in the
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* user data for the given object. Once the function has been used, the cache
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* should be used to retrieve user data. The purpose seems then to be to ensure
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* that the data in the object is always fresh.
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*
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* @access private
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* @since 2.5.0
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* @uses $wpdb WordPress database object for queries
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*
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* @param object $user The user data object.
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*/
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function _fill_user( &$user ) {
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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($meta->meta_value);
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$user->{$meta->meta_key} = $value;
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}
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}
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$level = $wpdb->prefix . 'user_level';
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if ( isset( $user->{$level} ) )
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$user->user_level = $user->{$level};
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// For backwards compat.
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if ( isset($user->first_name) )
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$user->user_firstname = $user->first_name;
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if ( isset($user->last_name) )
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$user->user_lastname = $user->last_name;
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if ( isset($user->description) )
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$user->user_description = $user->description;
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wp_cache_add($user->ID, $user, 'users');
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wp_cache_add($user->user_login, $user->ID, 'userlogins');
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wp_cache_add($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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/**
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* Sanitize every user field.
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*
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* If the context is 'raw', then the user object or array will get minimal santization of the int fields.
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*
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* @since 2.3.0
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* @uses sanitize_user_field() Used to sanitize the fields.
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*
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* @param object|array $user The User Object or Array
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* @param string $context Optional, default is 'display'. How to sanitize user fields.
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* @return object|array The now sanitized User Object or Array (will be the same type as $user)
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*/
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function sanitize_user_object($user, $context = 'display') {
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if ( is_object($user) ) {
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if ( !isset($user->ID) )
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$user->ID = 0;
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if ( isset($user->data) )
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$vars = get_object_vars( $user->data );
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else
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$vars = get_object_vars($user);
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foreach ( array_keys($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, $context);
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}
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$user->filter = $context;
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} else {
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if ( !isset($user['ID']) )
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$user['ID'] = 0;
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foreach ( array_keys($user) as $field )
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$user[$field] = sanitize_user_field($field, $user[$field], $user['ID'], $context);
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$user['filter'] = $context;
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}
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return $user;
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}
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/**
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* Sanitize user field based on context.
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*
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* Possible context values are: 'raw', 'edit', 'db', 'display', 'attribute' and 'js'. The
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* 'display' context is used by default. 'attribute' and 'js' contexts are treated like 'display'
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* when calling filters.
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*
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* @since 2.3.0
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* @uses apply_filters() Calls 'edit_$field' and '${field_no_prefix}_edit_pre' passing $value and
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* $user_id if $context == 'edit' and field name prefix == 'user_'.
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*
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* @uses apply_filters() Calls 'edit_user_$field' passing $value and $user_id if $context == 'db'.
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* @uses apply_filters() Calls 'pre_$field' passing $value if $context == 'db' and field name prefix == 'user_'.
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* @uses apply_filters() Calls '${field}_pre' passing $value if $context == 'db' and field name prefix != 'user_'.
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*
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* @uses apply_filters() Calls '$field' passing $value, $user_id and $context if $context == anything
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* other than 'raw', 'edit' and 'db' and field name prefix == 'user_'.
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* @uses apply_filters() Calls 'user_$field' passing $value if $context == anything other than 'raw',
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* 'edit' and 'db' and field name prefix != 'user_'.
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*
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* @param string $field The user Object field name.
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* @param mixed $value The user Object value.
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* @param int $user_id user ID.
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* @param string $context How to sanitize user fields. Looks for 'raw', 'edit', 'db', 'display',
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* 'attribute' and 'js'.
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* @return mixed Sanitized value.
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*/
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function sanitize_user_field($field, $value, $user_id, $context) {
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$int_fields = array('ID');
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if ( in_array($field, $int_fields) )
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$value = (int) $value;
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if ( 'raw' == $context )
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return $value;
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if ( !is_string($value) && !is_numeric($value) )
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return $value;
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$prefixed = false;
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if ( false !== strpos($field, 'user_') ) {
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$prefixed = true;
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$field_no_prefix = str_replace('user_', '', $field);
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}
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if ( 'edit' == $context ) {
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if ( $prefixed ) {
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$value = apply_filters("edit_$field", $value, $user_id);
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} else {
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$value = apply_filters("edit_user_$field", $value, $user_id);
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}
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if ( 'description' == $field )
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$value = esc_html($value);
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else
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$value = esc_attr($value);
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} else if ( 'db' == $context ) {
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if ( $prefixed ) {
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$value = apply_filters("pre_$field", $value);
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} else {
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$value = apply_filters("pre_user_$field", $value);
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}
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} else {
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// Use display filters by default.
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if ( $prefixed )
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$value = apply_filters($field, $value, $user_id, $context);
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else
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$value = apply_filters("user_$field", $value, $user_id, $context);
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}
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if ( 'user_url' == $field )
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$value = esc_url($value);
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if ( 'attribute' == $context )
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$value = esc_attr($value);
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else if ( 'js' == $context )
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$value = esc_js($value);
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return $value;
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}
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/**
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* Clean all user caches
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*
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|
* @since 3.0
|
|
*
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|
* @param int $id User ID
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|
* @return void
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*/
|
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function clean_user_cache($id) {
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$user = new WP_User($id);
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wp_cache_delete($id, 'users');
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wp_cache_delete($user->user_login, 'userlogins');
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wp_cache_delete($user->user_email, 'useremail');
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wp_cache_delete($user->user_nicename, 'userslugs');
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}
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?>
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