ErrorException Object
(
    [message:protected] => Trying to access array offset on value of type null
    [string:Exception:private] => 
    [code:protected] => 2
    [file:protected] => /home/artiques/public_html/travellingfoot.com/application/helpers/function_helper.php
    [line:protected] => 584
    [trace:Exception:private] => Array
        (
            [0] => Array
                (
                    [file] => /home/artiques/public_html/travellingfoot.com/application/helpers/function_helper.php
                    [line] => 584
                    [function] => custom_error_handler
                    [args] => Array
                        (
                            [0] => 2
                            [1] => Trying to access array offset on value of type null
                            [2] => /home/artiques/public_html/travellingfoot.com/application/helpers/function_helper.php
                            [3] => 584
                        )

                )

            [1] => Array
                (
                    [file] => /home/artiques/public_html/travellingfoot.com/application/controllers/City.php
                    [line] => 93
                    [function] => exchangeRate
                    [args] => Array
                        (
                            [0] => 18.75
                            [1] => MXN
                        )

                )

            [2] => Array
                (
                    [file] => /home/artiques/public_html/travellingfoot.com/system/core/CodeIgniter.php
                    [line] => 533
                    [function] => show
                    [class] => City
                    [type] => ->
                    [args] => Array
                        (
                            [0] => mexico
                            [1] => cancun
                        )

                )

            [3] => Array
                (
                    [file] => /home/artiques/public_html/travellingfoot.com/index.php
                    [line] => 323
                    [args] => Array
                        (
                            [0] => /home/artiques/public_html/travellingfoot.com/system/core/CodeIgniter.php
                        )

                    [function] => require_once
                )

        )

    [previous:Exception:private] => 
    [severity:protected] => 0
)