You can also log into your web host control panel, go to your htaccess section and add password protection for the directory. If you don't know how, call your hosting account's tech support.
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I installed, but if I just go to www.[mysite].com/phpformgen, it lets me right in. How can I add protection?
Your host provider will have utilities for adding password protection to web folders. Give them a call and describe your issue.
You can also try this. A neat project I found on here. https://sourceforge.net/projects/passwordprotect/
You can also log into your web host control panel, go to your htaccess section and add password protection for the directory. If you don't know how, call your hosting account's tech support.