Create Simple Sample PHP Script

Create simple sample php script that does the following: 1) From server 2, checks from server 1 if there is an update to the software files. 2) If there is, gives option to download the software files from server 1 onto server 2, and run the upgrade file on server 2. 3) If there isn't, gives option to re-download the software files from server 1 onto server 2, and run the upgrade file on server 2.