Generate a Unique Key

[FishSword]

Hiya,

 

What’s the best way of generating a unique key, that can’t be guessed easily?

 

I would like to create a unique key for both account activation and referral purposes, that includes a check-sum to help prevent users from easily guessing other users activation or referral keys.

 

Any help is greatly appreciated.

 

Many Thanks,

 

FishSword

[spiderwell]

a timestamp and sessionid stripped of non alpha numeric chatacters is not a bad one

[PaulRyan]

This is one I use all of the time as it will guaruntee to be unique

 

<?PHP

  function generateKey() {;
    $key = md5(time().$_SERVER['REMOTE_ADDR'].microtime());
    return $key;
  }

  echo generateKey();
?>

 

Try it out and tell me how it goes

 

Regards, PaulRyan.

[calvinschools]

sprinkle some salt on it