Vote for SourceGuardian
SourceGuardian Pro for PHP is a protection solution for your PHP scripts. Now with full native bytecode encoding, time limiting scripts, IP and domain locking and many other features. The main features include: Full feature list: Full Bytecode Encryption - Fully protecting your files, Standard SourceGuardian encryption, Free bundled SourceGuardian Obfuscator™ Engine, IP and domain limit your scripts automatically, Customised banners for trial scripts and for IP/Domain limited scripts, Even run scripts under virtual hosting accounts with no change to default php installation, Runs under Linux, FreeBSD and Windows, Encrypt multiple files, folders, projects with a single click.