Yes, all of our shared hosting accounts support phar (PHP Archive) files.
With phar files, you can bundle PHP applications and libraries into a single file. This makes them very easy to deploy and install. Phar files are analagous in function to Java's JAR (Java Archive) files.
To view the official online documentation about phar files and how to use them, please visit http://php.net/manual/en/intro.phar.php.