Need to Run a PHP script using CRON or ?

I have an application which creates temporary tables. My plan is to remove them after a 24 hour period and only those which are have a created time greater than 24 hours. That part I can do, my question is how will I be able to run this script which is a 2 part script. First thing I do is pull the names of the temporary tables which are going to be deleted from another table. From this result set, I need to DROP tables as well as remove the reference to them from the first table. I understand that I can run PHP from the command line but this would require PHP to installed as a CGI which I prefer not to do. I was hoping I that I could use CRON to run this script once a day... Any ideas?