Array
(
    [0] => Array
        (
            [file] => /home/everybod/public_html/includes/pdo_operation.php
            [line] => 64
            [function] => execute
            [class] => PDOStatement
            [type] => ->
            [args] => Array
                (
                    [0] => Array
                        (
                            [browserName] => UnKnown
                            [os] => 
                            [browserVersion] => UnKnown
                            [ip] => 54.163.209.109
                        )

                )

        )

    [1] => Array
        (
            [file] => /home/everybod/public_html/index.php
            [line] => 69
            [function] => insert
            [class] => PdoOpt
            [type] => ->
            [args] => Array
                (
                    [0] => tbl_tracking
                    [1] => Array
                        (
                            [browserName] => UnKnown
                            [os] => 
                            [browserVersion] => UnKnown
                            [ip] => 54.163.209.109
                        )

                )

        )

    [err_message] => SQLSTATE[23000]: Integrity constraint violation: 1048 Column 'os' cannot be null
)