PHP/アップロード, siiz.biz

PHP/アップロード

if (
isset($_POST["upload_btn_x"])
){
    if (
    !is_uploaded_file($_FILES["upfile"]["tmp_name"])
    ) {
        $li["err"][] = "ファイルが選択されてません";
    } elseif (
    !$handle = fopen($_FILES["upfile"]["tmp_name"], "r")
    ) {
        $li["err"][] = "ファイルオープンに失敗";
    } else{

        if(
        !empty($_POST["delete"])
        ){
            $sql = "delete from recruit";
            mysql_query($sql);
        }

        $ct = 0;
        $insert_ct = 0;
        while (
        ($buffer = fgetcsv_reg($handle))
        ) {
            mb_convert_variables("utf8", "sjis-win", $buffer);
        }

        fclose($handle);
        $filename = date("Ymd_His");
        $filename .= "_". $_FILES["upfile"]["name"];
        move_uploaded_file($_FILES["upfile"]["tmp_name"], "csv/{$filename}");
        chmod("csv/{$filename}", 0666);
        $li["msg"][] = "{$insert_ct}件登録しました。";
    }
}

//___ ERRORの参考になる
/*
        switch ($_FILES["upfile"]["error"]) {
            case UPLOAD_ERR_INI_SIZE:
                $message = "The uploaded file exceeds the upload_max_filesize directive in php.ini";
                break;
            case UPLOAD_ERR_FORM_SIZE:
                $message = "The uploaded file exceeds the MAX_FILE_SIZE directive that was specified in the HTML form";
                break;
            case UPLOAD_ERR_PARTIAL:
                $message = "The uploaded file was only partially uploaded";
                break;
            case UPLOAD_ERR_NO_FILE:
                $message = "No file was uploaded";
                break;
            case UPLOAD_ERR_NO_TMP_DIR:
                $message = "Missing a temporary folder";
                break;
            case UPLOAD_ERR_CANT_WRITE:
                $message = "Failed to write file to disk";
                break;
            case UPLOAD_ERR_EXTENSION:
                $message = "File upload stopped by extension";
                break;

            default:
                $message = "Unknown upload error";
                break;
        }
        return $message;
*/

<html>
<form  method="post" action="import.html" enctype="multipart/form-data">
<input type="hidden" name="MAX_FILE_SIZE" value="33554432" />
<input type="file" name="upfile"  />
<input type="submit" name="upload_btn_x" value="求人データインポート" />
</form>
</html>

___ Thanks.
エラーメッセージの説明
http://www.php.net/manual/ja/features.file-upload.errors.php

upload