function captcha($lang, $arglist = false)
{
$id = false;
if (is_array($arglist)) {
if (isset($arglist[0])) {
$id = $arglist[0];
}
}
$accepted = array('login', 'register', 'remindme', 'mailme', 'subscribe', 'unsubscribe', 'comment');
if ($id and !in_array($id, $accepted)) {
return run('error/badrequest', $lang);
}
$charset = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
$code = strrand($charset, 4);
if ($id) {
$_SESSION['captcha'][$id] = $code;
}
$img = strtag($code);
header('Content-Type: image/png');
header("Content-Disposition: inline; filename=captcha.png");
header("Cache-Control: no-cache");
imagepng($img);
imagedestroy($img);
return false;
}
function emailcrypto($text, $tag, $to, $subject, $sender = false)
{
global $signature, $mailer, $webmaster;
if (!$sender) {
$sender = $webmaster;
}
$img = strtag($tag);
ob_start();
imagepng($img);
imagedestroy($img);
$imgdata = ob_get_contents();
ob_end_clean();
$sep = md5(uniqid('sep'));
$data = chunk_split(base64_encode($imgdata));
$headers = <<<_SEP_
From: {$sender}
Return-Path: {$sender}
Content-Type: multipart/mixed; boundary="{$sep}"
X-Mailer: {$mailer}
_SEP_;
$body = '';
if ($text) {
$body .= <<<_SEP_
--{$sep}
Content-Type: text/plain; charset=utf-8
{$text}
{$signature}
_SEP_;
}
$body .= <<<_SEP_
--{$sep}
Content-Type: image/png; name="crypto.png"
Content-Transfer-Encoding: base64
Content-Disposition: inline; filename="crypto.png"
{$data}
--{$sep}--
_SEP_;
return @mail($to, $subject, $body, $headers);
}
