header("Cache-Control: no-store, no-cache, must-revalidate, proxy-revalidate");
header("Pragma: no-cache");
header("Content-type: image/png");
return;
}
}
global $wb, $admin;
if (!is_object($wb)) {
if (!is_object($admin)) {
$wb = new frontend();
} else {
$wb =& $admin;
}
}
// get list of available CAPTCHAS for the dropdown-listbox in admin-tools
$useable_captchas = array('calc_text' => $wb->lang()->translate('Calculation as text'), 'text' => $wb->lang()->translate('Text-CAPTCHA'));
if (extension_loaded('gd') && function_exists('imagepng')) {
$useable_captchas['calc_image'] = $wb->lang()->translate('Calculation as image');
$useable_captchas['old_image'] = $wb->lang()->translate('Old style (not recommended)');
if (function_exists('imagettftext')) {
$useable_captchas['calc_ttf_image'] = $wb->lang()->translate('Calculation as image with varying fonts and backgrounds');
$useable_captchas['ttf_image'] = $wb->lang()->translate('Image with varying fonts and backgrounds');
}
}
if (!function_exists('wb_call_captcha')) {
function wb_call_captcha($action = 'all', $style = '', $sec_id = '')
{
global $MOD_CAPTCHA;
$t = time();
$_SESSION['captcha_time'] = $t;
// get width and height of captcha image for use in <iframe>
