function rand_str($length = 32, $chars = ‘ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890′)
{
$chars_length = (strlen($chars) – 1);
$string = $chars{rand(0, $chars_length)};
for ($i = 1; $i < $length; $i = strlen($string))
{
$r = $chars{rand(0, $chars_length)};
if ($r != $string{$i – 1}) $string .= $r;
}
return $string;
}
echo rand_str(10);