public function executeImage()
{
$theme = sfConfig::get("app_phpcaptcha_theme", "Small");
if (class_exists("PHPCaptcha" . $theme . "Theme")) {
eval("\$theme = new PHPCaptcha" . $theme . "Theme();");
} else {
$theme = new PHPCaptchaSmallTheme();
}
$oVisualCaptcha = new PhpCaptcha($theme);
$oVisualCaptcha->setOwnerText(sfConfig::get("app_phpcaptcha_ownertext", ""));
$oVisualCaptcha->setHeight(sfConfig::get("app_phpcaptcha_height", $theme->getOption('height')));
$oVisualCaptcha->setWidth(sfConfig::get("app_phpcaptcha_width", $theme->getOption('width')));
$oVisualCaptcha->Create();
return sfView::NONE;
}