On Tue, 2003-06-17 at 02:45, Davy Obdam wrote:
> Hi people,
>
> I have to make a password generator, but i have a little problem.
>
> - It needs to generate password 8 characters long, and including 1 or 2
> special characters(like #$%&*@).
> - Those special characters can never appear as the first or last
> character in the string... anywhere between is fine.
>
> I have a password generator script now that does the first thing... but
> the special character can be in front or back of the string wich it
> shouldnt.. i have been looking on the web for this but i havent found
> the answer. Below is my scripts so far..
>
> Any help is appreciated, thanks for your time,
>
> Best regards,
>
> Davy Obdam
Please don't crosspost. Pick the suitable list (in this case, it would
have been php-general).
Anyway, just tell it not to use anything beyone the first 26 characters
of your allowable characters string. Below is one way to do it.
Good luck,
Torben
<?php
error_reporting(E_ALL);
ini_set('display_errors', true);
// A function to generate random alphanumeric passwords in PHP
// It expects to be passed a desired password length, but it
// none is passed the default is set to 8 (you can change this)
function generate_password($length = 8) {
// This variable contains the list of allowable characters
// for the password. Note that the number 0 and the letter
// 'O' have been removed to avoid confusion between the two.
// The same is true of 'I' and 1
$allowable_characters =
'abcdefghefghijklmnopqrstuvwxyz0123456789%#*&';
// We see how many characters are in the allowable list
$ps_len = strlen($allowable_characters);
// Max index of the characters allowed to stand and end the output.
$max_endpoint_ind = 25;
// 0-based index of the last char of the output
$last_char = $length - 1;
// Seed the random number generator with the microtime stamp
// (current UNIX timestamp, but in microseconds)
mt_srand((double)microtime() * 1000000);
// Declare the password as a blank string.
$pass = "";
// Loop the number of times specified by $length
for($i = 0; $i < $length; $i++) {
// Each iteration, pick a random character from the
// allowable string and append it to the password.
switch ($i) {
case 0:
case $last_char:
$pass .= $allowable_characters{mt_rand(0,
$max_endpoint_ind)};
break;
default:
$pass .= $allowable_characters{mt_rand(0, $ps_len)};
}
}
// Retun the password we've selected
return $pass;
}
for ($i = 0; $i < 100; $i++) {
echo generate_password() . "\n";
}
?>
--
Torben Wilson <[EMAIL PROTECTED]> +1.604.709.0506
http://www.thebuttlesschaps.com http://www.inflatableeye.com
http://www.hybrid17.com http://www.themainonmain.com
-----==== Boycott Starbucks! http://www.haidabuckscafe.com ====-----
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
