I've been working on a project which keeps getting some PHP inserted into the config.php file and it's causing a lot of issues with SEO. I'll paste in a sample of it (it's quite long) after this intro. I've removed it several times, changed the FTP password, admin password and username, the SALTs and checked the .htaccess - beyond that I'm stuck. Any idea how to solve this?
Part of the code, the middle cut down a lot;