function isImageFile($afile)
{
// Added by hoshiba-farm.com 2006.03.02
$t = "/^" . ereg_replace("/", "\\/", XOOPS_ROOT_PATH) . ereg_replace("/", "\\/", $GLOBALS['BlogCNF']['thumb_dir']) . "(.+\\.(gif|jpe?g|png|bmp)\$)/i";
$o = "/^" . ereg_replace("/", "\\/", XOOPS_ROOT_PATH) . ereg_replace("/", "\\/", $GLOBALS['BlogCNF']['img_dir']) . "(.+\\.(gif|jpe?g|png|bmp)\$)/i";
if (preg_match($t, $afile, $ss) || preg_match($o, $afile, $ss)) {
$res = download::get_original_name($ss[count($ss) - 2]);
// thumbnail file
} else {
$res = null;
}
return $res;
}