Generate secure passwords.

<?PHP
// selection of possible character
$letters = array("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");
$numbers = array("0", "1", "2", "3", "4", "5", "6", "7", "8", "9");
$special = array("!", "&", "=", "?");
$length = 8;

// Generate secure passwords
$password = "";
for($i=0; strlen($password)<$length; $i++){
 $random = mt_rand(1,100);
 if($random < 50)
  {$password.=$letters[mt_rand(0, count($letters)-1)];}
 elseif($random > 60)
  {$password.=$numbers[mt_rand(0, count($numbers)-1)];}
 else
  {$password.=$special[mt_rand(0, count($special)-1)];}
}
// output
echo "Password: $password";
?>