i want to protect my web page from user who don't belong there. So my main page ask them for a login and a password and actually the password is only stored into a database. So, wanting to have a better protection, i'd like to encrypt and decrypt my password. But when i try the function i've found into the online manual (php.net), i got this error :
Fatal error: Call to undefined function: mcrypt_encrypt()
isnt't those function automatically defined? What do I have to do to be able to use encryption?
thanx,
Jacinthe