Php random possibilities

how do you make a php script that will generate and list all possibilities for abcdefghijklmnopqrstuvwxyz and only 5 characters?

I know the normal random generator:
function makeRandomPassword() {
$salt = “abchefghjkmnpqrstuvwxyz”;
srand((double)microtime()*1000000);
$i = 0;
while ($i <= 7) {
$num = rand() % 33;
$tmp = substr($salt, $num, 1);
$pass = $pass . $tmp;
$i++;
}
return $pass;
}
$random_password = makeRandomPassword();
echo “Random Password is $random_password”;

any help?