"sarp_carrent.rar" appears to be a compressed archive file containing a vehicle rental script, likely for a San Andreas Multiplayer (SA-MP) or Multi Theft Auto (MTA) server, often associated with the framework .

: Use a tool like WinRAR or 7-Zip to right-click the file and select "Extract Here".

Are you seeing any when you try to compile or run the script? How To Open, Create, and Convert RAR Files - AVG.com