Send File Attachment from Form Using phpMailer and PHP

Try:

if (isset($_FILES['uploaded_file'])
    && $_FILES['uploaded_file']['error'] == UPLOAD_ERR_OK
) {
    $mail->addAttachment($_FILES['uploaded_file']['tmp_name'],
                         $_FILES['uploaded_file']['name']);
}

A basic example attaching multiple file uploads can be found here.

The function definition for addAttachment is:

/**
 * Add an attachment from a path on the filesystem.
 * Never use a user-supplied path to a file!
 * Returns false if the file could not be found or read.
 * Explicitly *does not* support passing URLs; PHPMailer is not an HTTP client.
 * If you need to do that, fetch the resource yourself and pass it in via a local file or string.
 *
 * @param string $path        Path to the attachment
 * @param string $name        Overrides the attachment name
 * @param string $encoding    File encoding (see $Encoding)
 * @param string $type        MIME type, e.g. `image/jpeg`; determined automatically from $path if not specified
 * @param string $disposition Disposition to use
 *
 * @throws Exception
 *
 * @return bool
 */
public function addAttachment(
    $path,
    $name="",
    $encoding = self::ENCODING_BASE64,
    $type="",
    $disposition = 'attachment'
)