+/**
+ * Handles sending password retrieval email to user.
+ *
+ * @uses $wpdb WordPress Database object
+ *
+ * @return bool|WP_Error True: when finish. WP_Error on error
+ */
+function retrieve_password() {
+ global $wpdb, $current_site;
+
+ $errors = new WP_Error();
+
+ if ( empty( $_POST['user_login'] ) ) {
+ $errors->add('empty_username', __('<strong>ERROR</strong>: Enter a username or e-mail address.'));
+ } else if ( strpos( $_POST['user_login'], '@' ) ) {
+ $user_data = get_user_by( 'email', trim( $_POST['user_login'] ) );
+ if ( empty( $user_data ) )
+ $errors->add('invalid_email', __('<strong>ERROR</strong>: There is no user registered with that email address.'));
+ } else {
+ $login = trim($_POST['user_login']);
+ $user_data = get_user_by('login', $login);
+ }
+
+ do_action('lostpassword_post');
+
+ if ( $errors->get_error_code() )
+ return $errors;
+
+ if ( !$user_data ) {
+ $errors->add('invalidcombo', __('<strong>ERROR</strong>: Invalid username or e-mail.'));
+ return $errors;
+ }
+
+ // redefining user_login ensures we return the right case in the email
+ $user_login = $user_data->user_login;
+ $user_email = $user_data->user_email;
+
+ do_action('retreive_password', $user_login); // Misspelled and deprecated
+ do_action('retrieve_password', $user_login);
+
+ $allow = apply_filters('allow_password_reset', true, $user_data->ID);
+
+ if ( ! $allow )
+ return new WP_Error('no_password_reset', __('Password reset is not allowed for this user'));
+ else if ( is_wp_error($allow) )
+ return $allow;
+
+ $key = $wpdb->get_var($wpdb->prepare("SELECT user_activation_key FROM $wpdb->users WHERE user_login = %s", $user_login));
+ if ( empty($key) ) {
+ // Generate something random for a key...
+ $key = wp_generate_password(20, false);
+ do_action('retrieve_password_key', $user_login, $key);
+ // Now insert the new md5 key into the db
+ $wpdb->update($wpdb->users, array('user_activation_key' => $key), array('user_login' => $user_login));
+ }
+ $message = __('Someone requested that the password be reset for the following account:') . "\r\n\r\n";
+ $message .= network_home_url( '/' ) . "\r\n\r\n";
+ $message .= sprintf(__('Username: %s'), $user_login) . "\r\n\r\n";
+ $message .= __('If this was a mistake, just ignore this email and nothing will happen.') . "\r\n\r\n";
+ $message .= __('To reset your password, visit the following address:') . "\r\n\r\n";
+ $message .= '<' . network_site_url("wp-login.php?action=rp&key=$key&login=" . rawurlencode($user_login), 'login') . ">\r\n";
+
+ if ( is_multisite() )
+ $blogname = $GLOBALS['current_site']->site_name;
+ else
+ // The blogname option is escaped with esc_html on the way into the database in sanitize_option
+ // we want to reverse this for the plain text arena of emails.
+ $blogname = wp_specialchars_decode(get_option('blogname'), ENT_QUOTES);
+
+ $title = sprintf( __('[%s] Password Reset'), $blogname );
+
+ $title = apply_filters('retrieve_password_title', $title);
+ $message = apply_filters('retrieve_password_message', $message, $key);
+
+ if ( $message && !wp_mail($user_email, $title, $message) )
+ wp_die( __('The e-mail could not be sent.') . "<br />\n" . __('Possible reason: your host may have disabled the mail() function...') );
+
+ return true;
+}
+
+/**
+ * Retrieves a user row based on password reset key and login
+ *
+ * @uses $wpdb WordPress Database object
+ *
+ * @param string $key Hash to validate sending user's password
+ * @param string $login The user login
+ * @return object|WP_Error User's database row on success, error object for invalid keys
+ */
+function check_password_reset_key($key, $login) {
+ global $wpdb;
+
+ $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'));
+
+ $user = $wpdb->get_row($wpdb->prepare("SELECT * FROM $wpdb->users WHERE user_activation_key = %s AND user_login = %s", $key, $login));
+
+ if ( empty( $user ) )
+ return new WP_Error('invalid_key', __('Invalid key'));
+
+ return $user;
+}
+
+/**
+ * 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) {
+ do_action('password_reset', $user, $new_pass);
+
+ wp_set_password($new_pass, $user->ID);
+
+ wp_password_change_notification($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 );
+ $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.' ) );
+ }
+
+ do_action( 'register_post', $sanitized_user_login, $user_email, $errors );
+
+ $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 ) {
+ $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 $user_id;
+}
+
+//
+// Main
+//
+
+$action = isset($_REQUEST['action']) ? $_REQUEST['action'] : 'login';
+$errors = new WP_Error();