Generate username and password...

Anon

Hello.
I want to build a php sysetm that gives for every user a different password.

plz help me...

Anon

Not a good idea. It is harder for users to remember a password they were forced to create because someone else had their password. You should use unique userid's instead.

Tom

Anon

I did this with my site, http://www.bigwolfoncampus.org/

I allow a user to specify a unique username and an e-mail address. The script randomly generates a 4-digit number as a password and e-mails it to the user. The user then has the option of changing the password later...

I don't think I'd do it this way again, though I do want to keep going for e-mail verification...

Anon

While randomized passwords are harder to remember, they can be usefull in some situations.

One way to do it is to assign each possible letter/number/symbol it's own number. Like "a" would be 1, "b" would be 2..."A" is 27", etc.

Easiest way to do that is just use list() to create a simple array filled with each option.

Use mt_rand() to pull a random number (if you have listed A-Z in your array, you'd make it pull a number between 0 and 25).

Assign that random number to a variable, say $x.

If your array was named $symbol, you'd do something similar to:

while ($i = 0, $i < 7) {
$x = mt_rand(0,25);
$password .= $symbol[$x];
++$i;
}

Note: make sure to "seed" mt_rand first.

This will (hopefully) make $password into a very random 6 character password.

If you do use random passwords, you'll probably want to allow your users to change it after they've entered it the first time.

Anon

problem..
what is
"$symbol"
?
is it the variable in the form?

Anon

$symbol is an array, which you will fill with the possible characters in your password.

For instance, let's say you have A-Z, and 0-9 for possibilitys in your password.

So, you would populate $symbol as such:

$symbol = array(0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z);

Set the mt_rand range between 0 and 35.

Let's say it pulls "9", so the first character in your password is 9. Next mt_rand pulls 35, so the second character is "Z".

Etc etc for as long as you want it to go.

$symbol can be populated with any symbol or character (or multiple characters/symbols) you can figure out to use.