function getrandomstring($length) { global $template; settype($template, "string"); $template = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"; settype($length, "integer"); settype($rndstring, "string"); settype($a, "integer"); settype($b, "integer"); for ($a = 0; $a <= $length; $a++) { $b = rand(0, strlen($template) - 1); $rndstring .= $template[$b]; } return $rndstring; } $i = 0; do { $word = getrandomstring(4); $md5 = md5($word, TRUE); if (substr($md5, -3) == "/..") { echo $word; echo "\n"; echo $md5; echo "\n"; } } while (True);