function upload($file_id, $folder="", $types="") {
    if(!$_FILES[$file_id]['name']) return array('','No file specified');

    $file_title = $_FILES[$file_id]['name'];
    //Get file extension
    $ext_arr = explode(".",basename($file_title));
    $ext = strtolower($ext_arr[count($ext_arr)-1]); //Get the last extension

    //Not really uniqe - but for all practical reasons, it is
    //Change the rules to create file name here
    //$uniqer = substr(md5(uniqid(rand(),1)),0,5);
    //$file_name = $uniqer . '_' . $file_title;//Get Unique Name

    $file_name = date('YmdHis').rand(999,9999).'-DP.jpg';

    $all_types = explode(",",strtolower($types));
    if($types) {
        if(in_array($ext,$all_types));
        else {
            $result = "'".$_FILES[$file_id]['name']."' is not a valid file."; //Show error if any.
            return array('',$result);
        }
    }

    //Where the file must be uploaded to
    if($folder) $folder .= '/';//Add a '/' at the end of the folder
    $uploadfile = $folder . $file_name;

    $result = '';
    //Move the file from the stored location to the new location
    if (!move_uploaded_file($_FILES[$file_id]['tmp_name'], $uploadfile)) {
        $result = "Cannot upload the file '".$_FILES[$file_id]['name']."'"; //Show error if any.
        if(!file_exists($folder)) {
            $result .= " : Folder don't exist.";
        } elseif(!is_writable($folder)) {
            $result .= " : Folder not writable.";
        } elseif(!is_writable($uploadfile)) {
            $result .= " : File not writable.";
        }
        $file_name = '';

    } else {
        if(!$_FILES[$file_id]['size']) { //Check if the file is made
            @unlink($uploadfile);//Delete the Empty file
            $file_name = '';
            $result = "Empty file found - please use a valid file."; //Show the error message
        } else {
            chmod($uploadfile,0777);//Make it universally writable.
        }
    }

    return array($file_name,$result);
}