PHPMailer（）上传和附件问题

Question

我正在尝试使用PHPMailer()发送电子邮件。通过电子邮件，我正在尝试发送附件。此外，附件将由用户上传，因此，提供了上传按钮。

<input type="file" name="fileToUpload" id="fileToUpload" />
<input type="hidden" name="MAX_FILE_SIZE" value="10000000" />

我的算法是将文件保存在服务器的attachments文件夹中。

$target_dir = "/attachments";
    $target_file = $target_dir . basename($_FILES["fileToUpload"]["name"]);
    $uploadOk = 1;
    $imageFileType = pathinfo($target_file,PATHINFO_EXTENSION);
    // Check if image file is a actual image or fake image
    if(isset($_POST["submit"])) {
        $check = getimagesize($_FILES["fileToUpload"]["tmp_name"]);
        if($check !== false) {
            echo "File is an image - " . $check["mime"] . ".";
            $uploadOk = 1;
        } else {
            echo "File is not an image.";
            $uploadOk = 0;
        }
    }
    // Check if file already exists
    if (file_exists($target_file)) {
        echo "Sorry, file already exists.";
        $uploadOk = 0;
    }
    // Check file size
    if ($_FILES["fileToUpload"]["size"] > 1000000000) {
        echo "Sorry, your file is too large.";
        $uploadOk = 0;
    }

    // Check if $uploadOk is set to 0 by an error
    if ($uploadOk == 0) {
        echo "Sorry, your file was not uploaded.";
    // if everything is ok, try to upload file
    } else {
        if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file)) {
            echo "The file ". basename( $_FILES["fileToUpload"]["name"]). " has been uploaded.";
        } else {
            echo "Sorry, there was an error uploading your file.";
        }
    }

上传后，我尝试将文件附加到电子邮件中。

$mail->addAttachment('attachments/'.$_FILES['fileToUpload']['name']);

我的问题是attachments文件夹中没有保存任何文件，也没有与电子邮件一起发送附件。但是，我成功地将剩下的电子邮件发送到我的预定目的地。