I was trying to figure out how to make random texts for random passwords and stuff, and I found someone who created this code.



I think it's pretty good. If anyone has a better one or suggestions, please tell me.

Well the only real way to work out whether it's good or not is to work out it's logic, yet I'm not in the mood for testing my brain, so I'll just rewrite this example in a different way but still same ending results, oh and I'll fix those notice errors for those undeclared variables.

Sorry to the author polmme it was a nice example indeed and a lot simpler to understand for beginners than my rewrite I admit.


<?php
for($code_length = 10, $newcode = ''; strlen($newcode) < $code_length; $newcode .= chr(!rand(0, 2) ? rand(48, 57) : (!rand(0, 1) ? rand(65, 90) : rand(97, 122))));

echo $newcode;
?>


I also have one I made based off someone elses code but I lost who that was, anyways here it is. I should have turned it into a function (just did), I know there was more I was going to do, which was randomise the characters within $salt string (just did) as well but didn't continue on this (just did), I might add to it later (just did), I got to be somewhere 5 minutes ago (just got back) What my intensions were, was to actually take a section from the string (just did) and use that as the password, as there really is no need to keep randomising it and then randomise again, and then do another randomise, although we could keep this going (stopped before this).


<?php
function mkRandPasswd()
{
    define('NUM0', 48);
    define('NUM9', 57);
    define('LETA', 65);
    define('LETZ', 90);
    define('LETa', 97);
    define('LETz', 122);
    $salt = '';
    $passwd = '';

    define('PASSWD_LEN', 10);

    for($nLoop = 0; $nLoop < NUM9 - NUM0 + 1; $nLoop++)
        $salt .= chr(mt_rand(NUM0, NUM9));
    for($ucLoop = 0; $ucLoop < LETZ - LETA + 1; $ucLoop++)
        $salt .= chr(mt_rand(LETA, LETZ));
    for($lcLoop = 0; $lcLoop < LETz - LETa + 1; $lcLoop++)
        $salt .= chr(mt_rand(LETa, LETz));

    $salt = str_shuffle($salt);

    for($gen = 0; $gen < PASSWD_LEN; $gen++)
        $passwd = $passwd . substr($salt, mt_rand() % strlen($salt), 1);

    return array($salt, $passwd);
}

list($salt, $passwd) = mkRandPasswd();

$str_passwd = substr($salt, strlen($salt) / 4, PASSWD_LEN);

echo 'Characters to select for password: ' . $salt . '<br /> The generated password: ' . $passwd . '<br /> The stringed password: ' . $str_passwd;

?>


Remember not much can be said about the script unless the logic is worked out, I still haven't worked mine out, but I can say it's safe enough for password generating, you still would require the user to change the password and not keep it.


Cheers,


MC

Yeah, those 2 codes and the Polmme did were all very nice. I wish that PHP would make its own function for generating that, though. :P

Interesting, I just made a random text generator, its located on my site. This code however generates only random letters between 4-7 characters long. The code is pretty simple:



Hope this is useful.

another way would to make a table with all the allowed signs
a,b,c,d,... ,A,B,C,D,... 1,2,3,...
let's say you get a table of 80 fields.
then you could just pick a random field
you could do this in various way: just rand(0,80)
if you have doubts about the randomness of rand, you could rand a random times and then start picking your letters
$i = rand(0,20);
for ($j=0; $j<$i;$j++) rand(0,80);
for ($i=0; $i<$passlenght;$i++)
$pw =$pw.$array[rand(0,80)];

or you could use srand

or you could go like rand(0,846854354)%80

anything that makes you feel safer