php загрузка изображений

Ответ от Николай[гуру]
$whitelist = array(".php", ".phtml", ".php3", ".php4");
$allow = false;
foreach ($whitelist as $item) {
if(preg_match("/$item$/i", $_FILES['userfile']['name']))
{
$allow = true;
break;
}
}
# дальше всё как было... или
$whitelist = array(".php", ".phtml", ".php3", ".php4");
foreach ($whitelist as $item)
if(preg_match("/$item$/i", $_FILES['userfile']['name']))
{
$uploaddir = 'uploads/';
$uploadfile = $uploaddir. basename($_FILES['userfile']['name']);
if (move_uploaded_file($_FILES['userfile']['tmp_name'], $uploadfile))
echo "File is valid, and was successfully uploaded.
";
else
echo "File uploading failed.
";
break;
}