问如何从ContactForm 7提交中获取数据？

EN

// add contact form 7 hook 
add_action('wpcf7_before_send_mail', 'my_get_form_values');

function my_get_form_values($contact_form)
{
    if ($contact_form->id==11) //your contact form 7 id
    {
        // get info about the form and current submission instance
        $submission = WPCF7_Submission::get_instance();
        if ( $submission )
        {
            $posted_data = $submission->get_posted_data();

            my_generate_xml($posted_data);
        }
    }
}

function my_generate_xml($posted_data)
{
    // get a serial number from the contact form to distinguish report from others
    $serial_no = $posted_data['SerialNumber'];

    // create xml doc spec
    $xml_doc = new DOMDocument('1.0', 'UTF-8');
    $xml_doc->formatOutput = true;

    // build maximizer xml file, do not use special characters
    $xml_root = $xml_doc->createElement('bug_report_' . $serial_no);
    $xml_doc->appendChild($xml_root);

    // create node for current user
    $xml_user = $xml_doc->createElement('User');

    $xml_fn = $xml_doc->createElement('firstname', $posted_data['firstname']);
    $xml_user->appendChild($xml_fn);

    $xml_ln = $xml_doc->createElement('lastname', $posted_data['lastname']);
    $xml_user->appendChild($xml_ln);

    $xml_root->appendChild($xml_user);

    // save it as a file for further processing
    $content = chunk_split(base64_encode($xml_doc->saveXML()));

    $uploads = wp_upload_dir();     

    $xml_doc->save($uploads['basedir'].'/prorh/'.(int)microtime(true).'-ticket-'.$serial_no.'.xml');
}