Carbylamine PHP Encoder is a.php Encoder for obfuscating/encoding PHP files so that antivirus detection signatures can be bypassed. Stops unauthorized personnel from reading, modifying and reverse engineering your code. Encoding is a process where the PHP source code is converted to an intermediate. machine readable format. This format is hard for humans to read and convert back to source code. As a result it protects your code from casual browsing. This means that if people obtain access to your site’s code they will not be able to use that for unintended purposes.
Source: https://thehackernews.com/2012/03/carbylamine-php-encoder-make-php-files.html