+/**
+ * Update all user caches
+ *
+ * @since 3.0.0
+ *
+ * @param object $user User object to be cached
+ */
+function update_user_caches($user) {
+ wp_cache_add($user->ID, $user, 'users');
+ wp_cache_add($user->user_login, $user->ID, 'userlogins');
+ wp_cache_add($user->user_email, $user->ID, 'useremail');
+ wp_cache_add($user->user_nicename, $user->ID, 'userslugs');
+}
+
+/**
+ * Clean all user caches
+ *
+ * @since 3.0.0
+ *
+ * @param WP_User|int $user User object or ID to be cleaned from the cache
+ */
+function clean_user_cache( $user ) {
+ if ( is_numeric( $user ) )
+ $user = new WP_User( $user );
+
+ if ( ! $user->exists() )
+ return;
+
+ wp_cache_delete( $user->ID, 'users' );
+ wp_cache_delete( $user->user_login, 'userlogins' );
+ wp_cache_delete( $user->user_email, 'useremail' );
+ wp_cache_delete( $user->user_nicename, 'userslugs' );
+}
+
+/**
+ * Checks whether the given username exists.
+ *
+ * @since 2.0.0
+ *
+ * @param string $username Username.
+ * @return null|int The user's ID on success, and null on failure.
+ */
+function username_exists( $username ) {
+ if ( $user = get_user_by('login', $username ) ) {
+ return $user->ID;
+ } else {
+ return null;
+ }
+}
+
+/**
+ * Checks whether the given email exists.
+ *
+ * @since 2.1.0
+ *
+ * @param string $email Email.
+ * @return bool|int The user's ID on success, and false on failure.
+ */
+function email_exists( $email ) {
+ if ( $user = get_user_by('email', $email) )
+ return $user->ID;
+
+ return false;
+}
+
+/**
+ * Checks whether a username is valid.
+ *
+ * @since 2.0.1
+ *
+ * @param string $username Username.
+ * @return bool Whether username given is valid
+ */
+function validate_username( $username ) {
+ $sanitized = sanitize_user( $username, true );
+ $valid = ( $sanitized == $username );
+ /**
+ * Filter whether the provided username is valid or not.
+ *
+ * @since 2.0.1
+ *
+ * @param bool $valid Whether given username is valid.
+ * @param string $username Username to check.
+ */
+ return apply_filters( 'validate_username', $valid, $username );
+}
+
+/**
+ * Insert a user into the database.
+ *
+ * Most of the $userdata array fields have filters associated with the values.
+ * The exceptions are 'rich_editing', 'role', 'jabber', 'aim', 'yim',
+ * 'user_registered', and 'ID'. The filters have the prefix 'pre_user_' followed
+ * by the field name. An example using 'description' would have the filter
+ * called, 'pre_user_description' that can be hooked into.
+ *
+ * @since 2.0.0
+ *
+ * @global wpdb $wpdb WordPress database object for queries.
+ *
+ * @param array $userdata {
+ * An array, object, or WP_User object of user data arguments.
+ *
+ * @type int $ID User ID. If supplied, the user will be updated.
+ * @type string $user_pass The plain-text user password.
+ * @type string $user_login The user's login username.
+ * @type string $user_nicename The URL-friendly user name.
+ * @type string $user_url The user URL.
+ * @type string $user_email The user email address.
+ * @type string $display_name The user's display name.
+ * Default is the the user's username.
+ * @type string $nickname The user's nickname. Default
+ * Default is the the user's username.
+ * @type string $first_name The user's first name. For new users, will be used
+ * to build $display_name if unspecified.
+ * @type stirng $last_name The user's last name. For new users, will be used
+ * to build $display_name if unspecified.
+ * @type string|bool $rich_editing Whether to enable the rich-editor for the user. False
+ * if not empty.
+ * @type string $user_registered Date the user registered. Format is 'Y-m-d H:i:s'.
+ * @type string $role User's role.
+ * @type string $jabber User's Jabber account username.
+ * @type string $aim User's AIM account username.
+ * @type string $yim User's Yahoo! messenger username.
+ * }
+ * @return int|WP_Error The newly created user's ID or a WP_Error object if the user could not
+ * be created.
+ */
+function wp_insert_user( $userdata ) {
+ global $wpdb;
+
+ if ( $userdata instanceof stdClass ) {
+ $userdata = get_object_vars( $userdata );
+ } elseif ( $userdata instanceof WP_User ) {
+ $userdata = $userdata->to_array();
+ }
+ // Are we updating or creating?
+ if ( ! empty( $userdata['ID'] ) ) {
+ $ID = (int) $userdata['ID'];
+ $update = true;
+ $old_user_data = WP_User::get_data_by( 'id', $ID );
+ // hashed in wp_update_user(), plaintext if called directly
+ $user_pass = $userdata['user_pass'];
+ } else {
+ $update = false;
+ // Hash the password
+ $user_pass = wp_hash_password( $userdata['user_pass'] );
+ }
+
+ $sanitized_user_login = sanitize_user( $userdata['user_login'], true );
+
+ /**
+ * Filter a username after it has been sanitized.
+ *
+ * This filter is called before the user is created or updated.
+ *
+ * @since 2.0.3
+ *
+ * @param string $sanitized_user_login Username after it has been sanitized.
+ */
+ $pre_user_login = apply_filters( 'pre_user_login', $sanitized_user_login );
+
+ //Remove any non-printable chars from the login string to see if we have ended up with an empty username
+ $user_login = trim( $pre_user_login );
+
+ if ( empty( $user_login ) ) {
+ return new WP_Error('empty_user_login', __('Cannot create a user with an empty login name.') );
+ }
+ if ( ! $update && username_exists( $user_login ) ) {
+ return new WP_Error( 'existing_user_login', __( 'Sorry, that username already exists!' ) );
+ }
+
+ // If a nicename is provided, remove unsafe user characters before
+ // using it. Otherwise build a nicename from the user_login.
+ if ( ! empty( $userdata['user_nicename'] ) ) {
+ $user_nicename = sanitize_user( $userdata['user_nicename'], true );
+ } else {
+ $user_nicename = $user_login;
+ }
+
+ $user_nicename = sanitize_title( $user_nicename );
+
+ // Store values to save in user meta.
+ $meta = array();
+
+ /**
+ * Filter a user's nicename before the user is created or updated.
+ *
+ * @since 2.0.3
+ *
+ * @param string $user_nicename The user's nicename.
+ */
+ $user_nicename = apply_filters( 'pre_user_nicename', $user_nicename );
+
+ $raw_user_url = empty( $userdata['user_url'] ) ? '' : $userdata['user_url'];
+
+ /**
+ * Filter a user's URL before the user is created or updated.
+ *
+ * @since 2.0.3
+ *
+ * @param string $raw_user_url The user's URL.
+ */
+ $user_url = apply_filters( 'pre_user_url', $raw_user_url );
+
+ $raw_user_email = empty( $userdata['user_email'] ) ? '' : $userdata['user_email'];
+
+ /**
+ * Filter a user's email before the user is created or updated.
+ *
+ * @since 2.0.3
+ *
+ * @param string $raw_user_email The user's email.
+ */
+ $user_email = apply_filters( 'pre_user_email', $raw_user_email );
+
+ /*
+ * If there is no update, just check for `email_exists`. If there is an update,
+ * check if current email and new email are the same, or not, and check `email_exists`
+ * accordingly.
+ */
+ if ( ( ! $update || ( ! empty( $old_user_data ) && $user_email !== $old_user_data->user_email ) )
+ && ! defined( 'WP_IMPORTING' )
+ && email_exists( $user_email )
+ ) {
+ return new WP_Error( 'existing_user_email', __( 'Sorry, that email address is already used!' ) );
+ }
+ $nickname = empty( $userdata['nickname'] ) ? $user_login : $userdata['nickname'];
+
+ /**
+ * Filter a user's nickname before the user is created or updated.
+ *
+ * @since 2.0.3
+ *
+ * @param string $nickname The user's nickname.
+ */
+ $meta['nickname'] = apply_filters( 'pre_user_nickname', $nickname );
+
+ $first_name = empty( $userdata['first_name'] ) ? '' : $userdata['first_name'];
+
+ /**
+ * Filter a user's first name before the user is created or updated.
+ *
+ * @since 2.0.3
+ *
+ * @param string $first_name The user's first name.
+ */
+ $meta['first_name'] = apply_filters( 'pre_user_first_name', $first_name );
+
+ $last_name = empty( $userdata['last_name'] ) ? '' : $userdata['last_name'];
+
+ /**
+ * Filter a user's last name before the user is created or updated.
+ *
+ * @since 2.0.3
+ *
+ * @param string $last_name The user's last name.
+ */
+ $meta['last_name'] = apply_filters( 'pre_user_last_name', $last_name );
+
+ if ( empty( $userdata['display_name'] ) ) {
+ if ( $update ) {
+ $display_name = $user_login;
+ } elseif ( $meta['first_name'] && $meta['last_name'] ) {
+ /* translators: 1: first name, 2: last name */
+ $display_name = sprintf( _x( '%1$s %2$s', 'Display name based on first name and last name' ), $meta['first_name'], $meta['last_name'] );
+ } elseif ( $meta['first_name'] ) {
+ $display_name = $meta['first_name'];
+ } elseif ( $meta['last_name'] ) {
+ $display_name = $meta['last_name'];
+ } else {
+ $display_name = $user_login;
+ }
+ } else {
+ $display_name = $userdata['display_name'];
+ }
+
+ /**
+ * Filter a user's display name before the user is created or updated.
+ *
+ * @since 2.0.3
+ *
+ * @param string $display_name The user's display name.
+ */
+ $display_name = apply_filters( 'pre_user_display_name', $display_name );
+
+ $description = empty( $userdata['description'] ) ? '' : $userdata['description'];
+
+ /**
+ * Filter a user's description before the user is created or updated.
+ *
+ * @since 2.0.3
+ *
+ * @param string $description The user's description.
+ */
+ $meta['description'] = apply_filters( 'pre_user_description', $description );
+
+ $meta['rich_editing'] = empty( $userdata['rich_editing'] ) ? 'true' : $userdata['rich_editing'];
+
+ $meta['comment_shortcuts'] = empty( $userdata['comment_shortcuts'] ) ? 'false' : $userdata['comment_shortcuts'];
+
+ $admin_color = empty( $userdata['admin_color'] ) ? 'fresh' : $userdata['admin_color'];
+ $meta['admin_color'] = preg_replace( '|[^a-z0-9 _.\-@]|i', '', $admin_color );
+
+ $meta['use_ssl'] = empty( $userdata['use_ssl'] ) ? 0 : $userdata['use_ssl'];
+
+ $user_registered = empty( $userdata['user_registered'] ) ? gmdate( 'Y-m-d H:i:s' ) : $userdata['user_registered'];
+
+ $meta['show_admin_bar_front'] = empty( $userdata['show_admin_bar_front'] ) ? 'true' : $userdata['show_admin_bar_front'];
+
+ $user_nicename_check = $wpdb->get_var( $wpdb->prepare("SELECT ID FROM $wpdb->users WHERE user_nicename = %s AND user_login != %s LIMIT 1" , $user_nicename, $user_login));
+
+ if ( $user_nicename_check ) {
+ $suffix = 2;
+ while ($user_nicename_check) {
+ $alt_user_nicename = $user_nicename . "-$suffix";
+ $user_nicename_check = $wpdb->get_var( $wpdb->prepare("SELECT ID FROM $wpdb->users WHERE user_nicename = %s AND user_login != %s LIMIT 1" , $alt_user_nicename, $user_login));
+ $suffix++;
+ }
+ $user_nicename = $alt_user_nicename;
+ }
+
+ $compacted = compact( 'user_pass', 'user_email', 'user_url', 'user_nicename', 'display_name', 'user_registered' );
+ $data = wp_unslash( $compacted );
+
+ if ( $update ) {
+ if ( $user_email !== $old_user_data->user_email ) {
+ $data['user_activation_key'] = '';
+ }
+ $wpdb->update( $wpdb->users, $data, compact( 'ID' ) );
+ $user_id = (int) $ID;
+ } else {
+ $wpdb->insert( $wpdb->users, $data + compact( 'user_login' ) );
+ $user_id = (int) $wpdb->insert_id;
+ }
+
+ $user = new WP_User( $user_id );
+
+ // Update user meta.
+ foreach ( $meta as $key => $value ) {
+ update_user_meta( $user_id, $key, $value );
+ }
+
+ foreach ( wp_get_user_contact_methods( $user ) as $key => $value ) {
+ if ( isset( $userdata[ $key ] ) ) {
+ update_user_meta( $user_id, $key, $userdata[ $key ] );
+ }
+ }
+
+ if ( isset( $userdata['role'] ) ) {
+ $user->set_role( $userdata['role'] );
+ } elseif ( ! $update ) {
+ $user->set_role(get_option('default_role'));
+ }
+ wp_cache_delete( $user_id, 'users' );
+ wp_cache_delete( $user_login, 'userlogins' );
+
+ if ( $update ) {
+ /**
+ * Fires immediately after an existing user is updated.
+ *
+ * @since 2.0.0
+ *
+ * @param int $user_id User ID.
+ * @param object $old_user_data Object containing user's data prior to update.
+ */
+ do_action( 'profile_update', $user_id, $old_user_data );
+ } else {
+ /**
+ * Fires immediately after a new user is registered.
+ *
+ * @since 1.5.0
+ *
+ * @param int $user_id User ID.
+ */
+ do_action( 'user_register', $user_id );
+ }
+
+ return $user_id;
+}
+
+/**
+ * Update a user in the database.
+ *
+ * It is possible to update a user's password by specifying the 'user_pass'
+ * value in the $userdata parameter array.
+ *
+ * If current user's password is being updated, then the cookies will be
+ * cleared.
+ *
+ * @since 2.0.0
+ *
+ * @see wp_insert_user() For what fields can be set in $userdata.
+ *
+ * @param mixed $userdata An array of user data or a user object of type stdClass or WP_User.
+ * @return int|WP_Error The updated user's ID or a WP_Error object if the user could not be updated.
+ */
+function wp_update_user($userdata) {
+ if ( $userdata instanceof stdClass ) {
+ $userdata = get_object_vars( $userdata );
+ } elseif ( $userdata instanceof WP_User ) {
+ $userdata = $userdata->to_array();
+ }
+
+ $ID = isset( $userdata['ID'] ) ? (int) $userdata['ID'] : 0;
+ if ( ! $ID ) {
+ return new WP_Error( 'invalid_user_id', __( 'Invalid user ID.' ) );
+ }
+
+ // First, get all of the original fields
+ $user_obj = get_userdata( $ID );
+ if ( ! $user_obj ) {
+ return new WP_Error( 'invalid_user_id', __( 'Invalid user ID.' ) );
+ }
+
+ $user = $user_obj->to_array();
+
+ // Add additional custom fields
+ foreach ( _get_additional_user_keys( $user_obj ) as $key ) {
+ $user[ $key ] = get_user_meta( $ID, $key, true );
+ }
+
+ // Escape data pulled from DB.
+ $user = add_magic_quotes( $user );
+
+ // If password is changing, hash it now.
+ if ( ! empty($userdata['user_pass']) ) {
+ $plaintext_pass = $userdata['user_pass'];
+ $userdata['user_pass'] = wp_hash_password($userdata['user_pass']);
+ }
+
+ wp_cache_delete($user[ 'user_email' ], 'useremail');
+
+ // Merge old and new fields with new fields overwriting old ones.
+ $userdata = array_merge($user, $userdata);
+ $user_id = wp_insert_user($userdata);
+
+ // Update the cookies if the password changed.
+ $current_user = wp_get_current_user();
+ if ( $current_user->ID == $ID ) {
+ if ( isset($plaintext_pass) ) {
+ wp_clear_auth_cookie();
+
+ // Here we calculate the expiration length of the current auth cookie and compare it to the default expiration.
+ // If it's greater than this, then we know the user checked 'Remember Me' when they logged in.
+ $logged_in_cookie = wp_parse_auth_cookie( '', 'logged_in' );
+ /** This filter is documented in wp-includes/pluggable.php */
+ $default_cookie_life = apply_filters( 'auth_cookie_expiration', ( 2 * DAY_IN_SECONDS ), $ID, false );
+ $remember = ( ( $logged_in_cookie['expiration'] - time() ) > $default_cookie_life );
+
+ wp_set_auth_cookie( $ID, $remember );
+ }
+ }
+
+ return $user_id;
+}
+
+/**
+ * A simpler way of inserting a user into the database.
+ *
+ * Creates a new user with just the username, password, and email. For more
+ * complex user creation use {@see wp_insert_user()} to specify more information.
+ *
+ * @since 2.0.0
+ * @see wp_insert_user() More complete way to create a new user
+ *
+ * @param string $username The user's username.
+ * @param string $password The user's password.
+ * @param string $email Optional. The user's email. Default empty.
+ * @return int The new user's ID.
+ */
+function wp_create_user($username, $password, $email = '') {
+ $user_login = wp_slash( $username );
+ $user_email = wp_slash( $email );
+ $user_pass = $password;
+
+ $userdata = compact('user_login', 'user_email', 'user_pass');
+ return wp_insert_user($userdata);
+}
+
+/**
+ * Return a list of meta keys that wp_insert_user() is supposed to set.
+ *
+ * @since 3.3.0
+ * @access private
+ *
+ * @param WP_User $user WP_User instance.
+ * @return array
+ */
+function _get_additional_user_keys( $user ) {
+ $keys = array( 'first_name', 'last_name', 'nickname', 'description', 'rich_editing', 'comment_shortcuts', 'admin_color', 'use_ssl', 'show_admin_bar_front' );
+ return array_merge( $keys, array_keys( wp_get_user_contact_methods( $user ) ) );
+}
+
+/**
+ * Set up the user contact methods.
+ *
+ * Default contact methods were removed in 3.6. A filter dictates contact methods.
+ *
+ * @since 3.7.0
+ *
+ * @param WP_User $user Optional. WP_User object.
+ * @return array Array of contact methods and their labels.
+ */
+function wp_get_user_contact_methods( $user = null ) {
+ $methods = array();
+ if ( get_site_option( 'initial_db_version' ) < 23588 ) {
+ $methods = array(
+ 'aim' => __( 'AIM' ),
+ 'yim' => __( 'Yahoo IM' ),
+ 'jabber' => __( 'Jabber / Google Talk' )
+ );
+ }
+
+ /**
+ * Filter the user contact methods.
+ *
+ * @since 2.9.0
+ *
+ * @param array $methods Array of contact methods and their labels.
+ * @param WP_User $user WP_User object.
+ */
+ return apply_filters( 'user_contactmethods', $methods, $user );
+}
+
+/**
+ * The old private function for setting up user contact methods.
+ *
+ * @since 2.9.0
+ * @access private
+ */
+function _wp_get_user_contactmethods( $user = null ) {
+ return wp_get_user_contact_methods( $user );
+}
+
+/**
+ * Gets the text suggesting how to create strong passwords.
+ *
+ * @since 4.1.0
+ *
+ * @return string The password hint text.
+ */
+function wp_get_password_hint() {
+ $hint = __( 'Hint: The password should be at least seven characters long. To make it stronger, use upper and lower case letters, numbers, and symbols like ! " ? $ % ^ & ).' );
+
+ /**
+ * Filter the text describing the site's password complexity policy.
+ *
+ * @since 4.1.0
+ *
+ * @param string $hint The password hint text.
+ */
+ return apply_filters( 'password_hint', $hint );
+}
+
+/**
+ * Retrieves a user row based on password reset key and login
+ *
+ * A key is considered 'expired' if it exactly matches the value of the
+ * user_activation_key field, rather than being matched after going through the
+ * hashing process. This field is now hashed; old values are no longer accepted
+ * but have a different WP_Error code so good user feedback can be provided.
+ *
+ * @global wpdb $wpdb WordPress database object for queries.
+ * @global PasswordHash $wp_hasher Portable PHP password hashing framework instance.
+ *
+ * @param string $key Hash to validate sending user's password.
+ * @param string $login The user login.
+ * @return WP_User|WP_Error WP_User object on success, WP_Error object for invalid or expired keys.
+ */
+function check_password_reset_key($key, $login) {
+ global $wpdb, $wp_hasher;
+
+ $key = preg_replace('/[^a-z0-9]/i', '', $key);
+
+ if ( empty( $key ) || !is_string( $key ) )
+ return new WP_Error('invalid_key', __('Invalid key'));
+
+ if ( empty($login) || !is_string($login) )
+ return new WP_Error('invalid_key', __('Invalid key'));
+
+ $row = $wpdb->get_row( $wpdb->prepare( "SELECT ID, user_activation_key FROM $wpdb->users WHERE user_login = %s", $login ) );
+ if ( ! $row )
+ return new WP_Error('invalid_key', __('Invalid key'));
+
+ if ( empty( $wp_hasher ) ) {
+ require_once ABSPATH . WPINC . '/class-phpass.php';
+ $wp_hasher = new PasswordHash( 8, true );
+ }
+
+ if ( $wp_hasher->CheckPassword( $key, $row->user_activation_key ) )
+ return get_userdata( $row->ID );
+
+ if ( $key === $row->user_activation_key ) {
+ $return = new WP_Error( 'expired_key', __( 'Invalid key' ) );
+ $user_id = $row->ID;
+
+ /**
+ * Filter the return value of check_password_reset_key() when an
+ * old-style key is used (plain-text key was stored in the database).
+ *
+ * @since 3.7.0
+ *
+ * @param WP_Error $return A WP_Error object denoting an expired key.
+ * Return a WP_User object to validate the key.
+ * @param int $user_id The matched user ID.
+ */
+ return apply_filters( 'password_reset_key_expired', $return, $user_id );
+ }
+
+ return new WP_Error( 'invalid_key', __( 'Invalid key' ) );
+}
+
+/**
+ * Handles resetting the user's password.
+ *
+ * @param object $user The user
+ * @param string $new_pass New password for the user in plaintext
+ */
+function reset_password( $user, $new_pass ) {
+ /**
+ * Fires before the user's password is reset.
+ *
+ * @since 1.5.0
+ *
+ * @param object $user The user.
+ * @param string $new_pass New user password.
+ */
+ do_action( 'password_reset', $user, $new_pass );
+
+ wp_set_password( $new_pass, $user->ID );
+ update_user_option( $user->ID, 'default_password_nag', false, true );
+
+ wp_password_change_notification( $user );
+}
+
+/**
+ * Handles registering a new user.
+ *
+ * @param string $user_login User's username for logging in
+ * @param string $user_email User's email address to send password and add
+ * @return int|WP_Error Either user's ID or error on failure.
+ */
+function register_new_user( $user_login, $user_email ) {
+ $errors = new WP_Error();
+
+ $sanitized_user_login = sanitize_user( $user_login );
+ /**
+ * Filter the email address of a user being registered.
+ *
+ * @since 2.1.0
+ *
+ * @param string $user_email The email address of the new user.
+ */
+ $user_email = apply_filters( 'user_registration_email', $user_email );
+
+ // Check the username
+ if ( $sanitized_user_login == '' ) {
+ $errors->add( 'empty_username', __( '<strong>ERROR</strong>: Please enter a username.' ) );
+ } elseif ( ! validate_username( $user_login ) ) {
+ $errors->add( 'invalid_username', __( '<strong>ERROR</strong>: This username is invalid because it uses illegal characters. Please enter a valid username.' ) );
+ $sanitized_user_login = '';
+ } elseif ( username_exists( $sanitized_user_login ) ) {
+ $errors->add( 'username_exists', __( '<strong>ERROR</strong>: This username is already registered. Please choose another one.' ) );
+ }
+
+ // Check the e-mail address
+ if ( $user_email == '' ) {
+ $errors->add( 'empty_email', __( '<strong>ERROR</strong>: Please type your e-mail address.' ) );
+ } elseif ( ! is_email( $user_email ) ) {
+ $errors->add( 'invalid_email', __( '<strong>ERROR</strong>: The email address isn’t correct.' ) );
+ $user_email = '';
+ } elseif ( email_exists( $user_email ) ) {
+ $errors->add( 'email_exists', __( '<strong>ERROR</strong>: This email is already registered, please choose another one.' ) );
+ }
+
+ /**
+ * Fires when submitting registration form data, before the user is created.
+ *
+ * @since 2.1.0
+ *
+ * @param string $sanitized_user_login The submitted username after being sanitized.
+ * @param string $user_email The submitted email.
+ * @param WP_Error $errors Contains any errors with submitted username and email,
+ * e.g., an empty field, an invalid username or email,
+ * or an existing username or email.
+ */
+ do_action( 'register_post', $sanitized_user_login, $user_email, $errors );
+
+ /**
+ * Filter the errors encountered when a new user is being registered.
+ *
+ * The filtered WP_Error object may, for example, contain errors for an invalid
+ * or existing username or email address. A WP_Error object should always returned,
+ * but may or may not contain errors.
+ *
+ * If any errors are present in $errors, this will abort the user's registration.
+ *
+ * @since 2.1.0
+ *
+ * @param WP_Error $errors A WP_Error object containing any errors encountered
+ * during registration.
+ * @param string $sanitized_user_login User's username after it has been sanitized.
+ * @param string $user_email User's email.
+ */
+ $errors = apply_filters( 'registration_errors', $errors, $sanitized_user_login, $user_email );
+
+ if ( $errors->get_error_code() )
+ return $errors;
+
+ $user_pass = wp_generate_password( 12, false );
+ $user_id = wp_create_user( $sanitized_user_login, $user_pass, $user_email );
+ if ( ! $user_id || is_wp_error( $user_id ) ) {
+ $errors->add( 'registerfail', sprintf( __( '<strong>ERROR</strong>: Couldn’t register you… please contact the <a href="mailto:%s">webmaster</a> !' ), get_option( 'admin_email' ) ) );
+ return $errors;
+ }
+
+ update_user_option( $user_id, 'default_password_nag', true, true ); //Set up the Password change nag.
+
+ wp_new_user_notification( $user_id, $user_pass );
+
+ return $user_id;
+}
+
+/**
+ * Retrieve the current session token from the logged_in cookie.
+ *
+ * @since 4.0.0
+ *
+ * @return string Token.
+ */
+function wp_get_session_token() {
+ $cookie = wp_parse_auth_cookie( '', 'logged_in' );
+ return ! empty( $cookie['token'] ) ? $cookie['token'] : '';
+}
+
+/**
+ * Retrieve a list of sessions for the current user.
+ *
+ * @since 4.0.0
+ * @return array Array of sessions.
+ */
+function wp_get_all_sessions() {
+ $manager = WP_Session_Tokens::get_instance( get_current_user_id() );
+ return $manager->get_all();
+}
+
+/**
+ * Remove the current session token from the database.
+ *
+ * @since 4.0.0
+ */
+function wp_destroy_current_session() {
+ $token = wp_get_session_token();
+ if ( $token ) {
+ $manager = WP_Session_Tokens::get_instance( get_current_user_id() );
+ $manager->destroy( $token );
+ }
+}
+
+/**
+ * Remove all but the current session token for the current user for the database.
+ *
+ * @since 4.0.0
+ */
+function wp_destroy_other_sessions() {
+ $token = wp_get_session_token();
+ if ( $token ) {
+ $manager = WP_Session_Tokens::get_instance( get_current_user_id() );
+ $manager->destroy_others( $token );
+ }
+}
+
+/**
+ * Remove all session tokens for the current user from the database.
+ *
+ * @since 4.0.0
+ */
+function wp_destroy_all_sessions() {
+ $manager = WP_Session_Tokens::get_instance( get_current_user_id() );
+ $manager->destroy_all();
+}