<?php
 
function createPassword($len = 8, $regex = "a-hjknp-zA-HJKNP-Z2-9")
    {
        $pass = null;
        $lchar = null;
        for ($i = 0; $i < $len; $i++) {
            $char = chr(mt_rand(48, 122));
            while (!preg_match("/[$regex]/", $char)) {
                if ($char == $lchar) {
                    continue;
                }
                $char = chr(rand(48, 122));
            }
            $pass .= $char;
            $lchar = $char;
        }
 
        return $pass;
    }
 
    function createUUID($regex = "a-hjknp-zA-HJKNP-Z2-9")
    {
        return sprintf('%8s-%4s-%4s-%4s-%12s',
            createPassword(8, $regex),
            createPassword(4, $regex),
            createPassword(4, $regex),
            createPassword(4, $regex),
            createPassword(12, $regex)
        );
    }
 
    echo createUUID();

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