File encryption / decription in CodeIgniter

[eluser]WanWizard[/eluser]
I can't think of any 'binary' solution for PHP that can encrypt/decrypt files without loading them completely in memory. And doing it in code will prove to be extremely slow I',m afraid.

Do you have shell access on this private server? If so, you could use GnuPG as a Q&D workaround...

An other alternative is use EncFS, and have the filesystem encrypt them on the fly when you save them.