I am using http://detectmobilebrowsers.mobi/ and don't know where to place the function 

require_once('mobile_device_detect.php');
mobile_device_detect(true,false,true,true,true,true,true,false,false);

I generated on http://detectmobilebrowsers.mobi/help/
It looks like it could be placed in mobile_theme/mobile_theme.api.php but I'm not sure how to add it to the array.
Do I need to require_once('mobile_device_detect.php');?
Thanks.