<?php

$upload_dir = "./uploads"; // upload folder
$file_name = $_FILES["upfile"]["name"];
 // MIME TYPES LIST: http://reference.sitepoint.com/html/mime-types-full
 $allowed_types = array("image/gif","image/jpeg","text/html","image/png");
if(!in_array($_FILES["upfile"]["type"],$allowed_types)) {
    die("Upload non consentito per questo tipo di file. ");
}

if(trim($_FILES["upfile"]["name"]) == "") {
die("Error1");
}

if(@is_uploaded_file($_FILES["upfile"]["tmp_name"])) {
    @move_uploaded_file($_FILES["upfile"]["tmp_name"], "$upload_dir/$file_name")
    or die("Error2");
} else {
    die("Problems with " . $_FILES["upfile"]["name"]);
}

echo "<div [class='alert alert-success'>Upload with success " . $_FILES["upfile"]"name"] . "</div>";
?>