set_time_limit(0);

function _rand() {

$length=26;

$chars = “0123456789abcdefghijklmnopqrstuvwxyz”;

$max = strlen($chars) – 1;

mt_srand((double)microtime() * 1000000);

$string = ”;

for($i = 0; $i < $length; $i++) {

$string .= $chars[mt_rand(0, $max)];

}

return $string;

} [...]