如果用户已更新，则调用此操作，并使用以下参数：
\'profile_update\', $user_id, $old_user_data );

以下是来自的相关代码user.php 在里面wp_insert_user()

if ( $update ) {
    /**
     * Fires immediately after an existing user is updated.
     *
     * @since 2.0.0
     *
     * @param int     $user_id       User ID.
     * @param WP_User $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 );
}