ALL PHP files added with garbage code

I’ve gone to those links even before when it first happened. i suspected the timthump.php vulnerability back then.

code snippet (hacked index.php). I don’t think it’s a simple password got hacked thing. Any thoughts?

[ Don’t post malware code here. If you must share that bad stuff (really don’t) use pastebin.com instead. ]

OK sorry. Can you please just help me with the SSH command for searching my php files for partial string “GetMama” ? I tried:

find . -exec grep -l “GetMama” {} \;

But it returns, -bash: GetMama: command not found
find: missing argument to `-exec’