PHP Generate Random Passwords

xUx Code, Linux, Software

This is a small script written in PHP which will help you to generate N passwords of N length in less than 1ms 😛

Make sure you have PHP installed, then copy this code to a file called randompass.php

PHP
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
#!/usr/bin/php -q
<?
// no i,l,o keep passwords easy
$chars = "abcdefghjkmnpqrstuvwxyz0123456789";
$passlen = (intval($argv[1])? intval($argv[1]):6);
$passnum = (intval($argv[2])? intval($argv[2]):1);
 
echo "Generating $passnum passwords of $passlen letters/numbers\n";
// feed the random God :P
srand(((int)((double)microtime()*1000003)));
 
for ($i=1;$i<=$passnum;$i++) _gen_pass();
 
function _gen_pass() {
  global $chars, $passlen;
  $cnt = 1;
  while ($cnt <= $passlen) {
    $myrand = rand() % 33;
    $tmp = substr($chars, $myrand, 1);
    if (rand(0,1)) $tmp = strtoupper($tmp);
    $pass = $pass . $tmp;
    $cnt++;
  }
  echo $pass . "\n";
}
 
?>

Now you have the file don’t forget to make it executable:

Shell
1
chmod +x randompass.php

How it works? See some examples:

Shell
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Usage: ./randompass.php [password_length] [password_number]
 
# The default execution will drop 1 password of 6 letters/numbers
./randompass.php
Generating 1 passwords of 6 letters/numbers
9hBEq1
 
# want 5 passwords of 12 letters/numbers ?
./randompass.php 12 5
Generating 5 passwords of 12 letters/numbers
ug5Tj8fP3w26
Tn9fnSjy2PmJ
NRqC6m8J0svn
YFQ6g3WnHH8r
ds56SnQvsBEq

That’s all, use it for what you need, don’t try to break it or find stupid bugs 😛

Leave a Reply