We're not building a proper package yet, but you can copy `build/$VARIANT/src/bindings/php/hammer.so` to your PHP extension directory (`scons test` will do this for you if you're using phpenv; for a system-wide php you'll probably have to use sudo) and add "extension=hammer.so" to your php.ini. There is a "hammer.ini" in src/bindings/php for your convenience; you can put it in the `conf.d` directory where PHP expects to find its configuration. `scons test` will do this for you too. You'll also need to point your include_path to the location of hammer.php, which will be `build/$VARIANT/src/bindings/php/hammer.php` until you put it somewhere else.
