simply add or include() the PHP Pass code to the top of your file(s), change the password to what you want it to be, and it's done - any time someone connects to that script, they'll be given a login form. It works across sessions, so they only have to enter the password once. It can be used to protect multiple files, and it can use multiple passwords. It can email you when a user enters an incorrect password, or it can write log data to a file of your choice. Now with optional session timeout - force users to re-enter password after certain idle time elapses.