Error occurred!

PDOException Object
(
    [message:protected] => SQLSTATE[HY000] [2002] Connection refused
    [string:Exception:private] => 
    [code:protected] => 2002
    [file:protected] => /var/www/html/modules/db.php
    [line:protected] => 12
    [trace:Exception:private] => Array
        (
            [0] => Array
                (
                    [file] => /var/www/html/modules/db.php
                    [line] => 12
                    [function] => __construct
                    [class] => PDO
                    [type] => ->
                )

            [1] => Array
                (
                    [file] => /var/www/html/modules/db.php
                    [line] => 31
                    [function] => get_connection
                    [class] => DB
                    [type] => ::
                )

            [2] => Array
                (
                    [file] => /var/www/html/modules/db.php
                    [line] => 69
                    [function] => execute
                    [class] => DB
                    [type] => ::
                )

            [3] => Array
                (
                    [file] => /var/www/html/models/GalleryPost.php
                    [line] => 41
                    [function] => query_one
                    [class] => DB
                    [type] => ::
                )

            [4] => Array
                (
                    [file] => /var/www/html/views/home.php
                    [line] => 23
                    [function] => get_random
                    [class] => GalleryPost
                    [type] => ::
                )

            [5] => Array
                (
                    [file] => /var/www/html/modules/page_builder.php
                    [line] => 14
                    [args] => Array
                        (
                            [0] => /var/www/html/views/home.php
                        )

                    [function] => require
                )

            [6] => Array
                (
                    [file] => /var/www/html/index.php
                    [line] => 64
                    [function] => PageBuilder\load_page
                )

        )

    [previous:Exception:private] => 
    [errorInfo] => Array
        (
            [0] => HY000
            [1] => 2002
            [2] => Connection refused
        )

)