<?php

        function sec_pass($kb,$gb,$sz,$z)
                {
                        $pass = array();
// Variablen definieren, Kleinbuchstaben, Großbuchstaben, Zahlen und Sonderzeichen
                        $var["kb"] = 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","ä","ö","ü");
                        $var["gb"] = 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","Ä","Ö","Ü");
                        $var["sz"] = array("!","§","%","/","(",")","=","{","[","]","}","*","+","-","_",".",",","<",">","ß");
                        $var["z"] = array("1","2","3","4","5","6","7","8","9","0");
// jetzt alles gut per Zufall entscheiden lassen
                        for ($a=0;$a<$kb;$a++)
                                {
                                        $pass[] = $var["kb"][rand(0,count($var["kb"])-1)];
                                }
                        for ($a=0;$a<$gb;$a++)
                                {
                                        $pass[] = $var["gb"][rand(0,count($var["gb"])-1)];
                                }
                        for ($a=0;$a<$sz;$a++)
                                {
                                        $pass[] = $var["sz"][rand(0,count($var["sz"])-1)];
                                }
                        for ($a=0;$a<$z;$a++)
                                {
                                        $pass[] = $var["z"][rand(0,count($var["z"])-1)];
                                }
                        $var = array();
// jetzt alles gut durchschütteln
                        shuffle($pass);
                        for ($a=0;$a<count($pass);$a++)
                                {
                                        $pass_ret .= $pass[$a];
                                }
                        $pass = array();
                        return $pass_ret;
                }

        echo sec_pass(12,6,2,12); // ergibt ein Passwort mit 12 Kleinbuchstaben, 6 Großbuchstaben, 2 Sonderzeichen, 12 Zahlen

?>