/**
* Check if a file is an image.
*
* @return boolean
* @param string $tag
* @param int $isMime
*/
function isImage($tag, $isMime = false)
{
if ($isMime) {
$tag = zmgMimeHelper::convertMimeToExtension($tag);
}
return in_array($tag, zmgMimeHelper::_acceptableImageList());
}
