public static function make_newkey()
{
$status = 0;
$key = '';
while ($status == 0) {
$str = '';
for ($i = 1; $i <= 15; $i++) {
$n = rand(1, 3);
switch ($n) {
case 1:
$str = $str . chr(rand(65, 90));
#大寫英文
break;
case 2:
$str = $str . chr(rand(97, 122));
#小寫英文
break;
case 3:
$str = $str . chr(rand(48, 57));
#數字
break;
}
}
$keydata = '';
$keydata = dbconn::get_usrkey($str);
if (empty($keydata)) {
$status = 1;
}
}
return $str;
}