I have this Banner ad rotation script.
$banner[1] = '<a href="http://www.facebook.com/mstrgmrs"><img src="/adverts/mstr_gmrs.png" width="900" height="200" border="1"></a>';
$banner[2] = '<a href="http://www.twitter.com/mstrgmrs"><img src="/adverts/banner_ad.png" width="900" height="200" border="1"></a>';
$banner[3] = '<a href="http://www.youtube.com/user/mstrgmrs"><img src="/adverts/banner_ad.png" width="900" height="200" border="1"></a>';
$banner[4] = '<a href="http://mastergmrs.enjin.com/"><img src="/adverts/banner_ad.png" width="900" height="200" border="1"></a>';
$id = rand(1,4);
echo $banner[$id];
How can I make it so that code can work with a database?