Secure password generator with a variable maximum amount of symbols.
<?php
function passwdGen($minLength = 8, $maxLength = 12, $maxSymbols = 2)
{
 $symbolCount = 0;
 srand((double)microtime() * 1000003);
 for ($i = 0; $i < rand($minLength, $maxLength); $i++)
 {
 do
 {
 $char = rand(33, 126);
 $symbolCount += $isSymbol = (!in_array($char, range(48, 57)) && !in_array($char, range(65, 90)) && !in_array($char, range(97, 122)));
 if ($symbolCount <= $maxSymbols || !$isSymbol)
 {
 break;
 }
 }
 while (true);
 $passwd = sprintf('%s%c', isset($passwd) ? $passwd : NULL, $char);
 }
 return $passwd;
}
?>