Difficulty editing in FTP

Hi, We currently have a website built on SilverStripe CMS, when accessing the ftp, I am coming across the message below when trying to look in the index file. /************************************************************************************ ************************************************************************************ ** ** ** If you can read this text in your browser then you don't have PHP installed. ** ** Please install PHP 5.3.2 or higher, preferably PHP 5.3.4+. ** ** ** ************************************************************************************ ************************************************************************************/ This is a company computer and I'm concerned that I may overload it with unnecessary information. Can you please advise what to do/what I need to install to be able to edit the site? Many thanks Kayla Sutcliffe Marketing [e3]marketing@commsprovider.co.uk<mailto:marketing@commsprovider.co.uk> [The most complete communications provider in the UK Logo] [t1]0845 855 0700 [f2] 0845 855 0600 [w1] commsprovider.co.uk<http://www.commsprovider.co.uk/> [CP MPRORIGHT lofo.png] CAUTION. This message may contain privileged and confidential information intended only for the use of the addressee named above. If you are not the intended recipient of this message you are hereby notified that any use, dissemination, distribution or reproduction of this message is prohibited. If you have received this message in error please notify CommsProvider immediately. Any views expressed in this message are those of the individual sender and may not necessarily reflect the views of CommsProvider and its associated companies Follow us on [Facebook Icon3] <http://en-gb.facebook.com/pages/CommsProvider/112020088836072> [Twitter Icon 1] <https://twitter.com/CommsProvider> [LinkedIn Icon1] <http://uk.linkedin.com/company/commsprovider> [youtube (2).png] <http://www.youtube.com/user/CommsProvider> --------------------------------------------------------------------------------------- This email has been scanned for email related threats and delivered safely by Mimecast. For more information please visit http://www.mimecast.com ---------------------------------------------------------------------------------------