如何将PHP脚本添加到wordpress

I have a code that fetch data from an API and add the data as posts in Wordpress. It's suppose to run hourly.

I don't understand where i place this script in wordpress?

This is the script, it's a php class with a hourly trigger.

class MND_News_Importer
{
    private function _schedule_import()
        {
            // If the schedule isn't set
            if ( !wp_next_scheduled( self::CRON_NAME ) )
            {
                // Use the built in function wp_schedule event to run the function every hour
                wp_schedule_event( time(), 'hourly', self::CRON_NAME );
            }
        }
}

Full code can be found here: http://webbgaraget.se/2014/05/28/importera-nyheter-fran-mynewsdesk-till-wordpress-del-1/

Where am i suppose to place this code?

You can add this class into function.php file in WordPress.

function.php location wp-content/themes/(activeTheme)/function.php