用于 pdf 转换和电子邮件的 Wordpress 插件构建

问：

我正在尝试编写一个简单的插件，该插件将 WP 表单提交转换为 PDF 文件，并使用 Google Translate API 自动将它们翻译成三种不同的语言。 我的开发环境在本地主机上。我也在服务器上尝试了代码，问题仍然存在。

我面临的问题是代码甚至不发送电子邮件。我一直在尝试调试它，但没有成功。如果我使用 WordPress 的wp_mail功能发送测试电子邮件，它似乎无法按预期工作。电子邮件发送功能是我插件的关键部分，我将不胜感激在识别和解决此问题方面的任何帮助。

这是我目前为止的代码：

    <?php
    /*
    PLUGIN DESCRIPTION HERE
    */

    // Hook into the WPForms submission process
    add_action('wpforms_process_complete', 'translate_send_pdf_wpforms_process_complete', 10, 4);

    function echo_log( $what )
    {
        echo '<pre>'.print_r( $what, true ).'</pre>';
    }

    function translate_send_pdf_wpforms_process_complete($fields, $entry, $form_data, $entry_id) {
        
        $form_data = wpforms()->form->get($form_data['id']);
        echo_log($form_data);
        $user_submitted_data = wpforms()->entry->get($entry_id);

        // send_test_email($entry_id);

        $name_field = 'Single Line Text'; 
        $person_name = isset($user_submitted_data[$name_field]) ? $user_submitted_data[$name_field] : 'Unknown';

        error_log('person_name: ' . print_r($person_name, true));
        echo $person_name;
        echo 'hello';

        // Generate PDF for each language
        $languages = array('de', 'fr', 'es');
        $pdf_files = array();
        foreach ($languages as $language) {
            $translated_content = translate_content($user_submitted_data, $language);
            $pdf_content = generate_pdf($translated_content);
            $pdf_files[$language] = $pdf_content;
        }
        send_pdf_email(
            $pdf_files,
            $languages,
            $person_name
        );

    }

    // Function to translate content
    function translate_content($content, $target_language) {
        $api_key = 'API KEY HERE';
        $url = 'https://translation.googleapis.com/language/translate/v2?key=' . $api_key;

        $data = array(
            'q' => $content,
            'source' => 'en',
            'target' => $target_language,
        );

        // Initialize cURL session
        $handle = curl_init($url);
        curl_setopt($handle, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($handle, CURLOPT_POST, true);
        curl_setopt($handle, CURLOPT_POSTFIELDS, $data);

        // Execute the translation request
        $response = curl_exec($handle);

        // Close the cURL session
        curl_close($handle);

        // Parse the translation response
        $translation_data = json_decode($response, true);

        // Check if translation was successful
        if (isset($translation_data['data']['translations'][0]['translatedText'])) {
            // Extract and return the translated content
            $translated_content = $translation_data['data']['translations'][0]['translatedText'];
            return $translated_content;
        } else {
            // Return the original content if translation failed
            return $content;
        }

        return $content;
    }

    // Function to generate PDF from content using TCPDF
    function generate_pdf($content) {
        // Include the TCPDF library if not already included
        if (!class_exists('TCPDF')) {
            require_once('/tcpdf-wrapper/lib/tcpdf/tcpdf.php');
        }

        // Create a new TCPDF instance
        $pdf = new TCPDF(PDF_PAGE_ORIENTATION, PDF_UNIT, PDF_PAGE_FORMAT, true, 'UTF-8', false);

        // Set document information
        $pdf->SetCreator('Name');
        $pdf->SetAuthor('Name');
        $pdf->SetTitle('Translated PDF');
        $pdf->SetSubject('Translated PDF');
        $pdf->SetKeywords('PDF, translation');

        // Set default header and footer fonts
        $pdf->setHeaderFont(Array(PDF_FONT_NAME_MAIN, '', PDF_FONT_SIZE_MAIN));
        $pdf->setFooterFont(Array(PDF_FONT_NAME_DATA, '', PDF_FONT_SIZE_DATA));

        // Set margins
        $pdf->SetMargins(PDF_MARGIN_LEFT, PDF_MARGIN_TOP, PDF_MARGIN_RIGHT);
        $pdf->SetHeaderMargin(PDF_MARGIN_HEADER);
        $pdf->SetFooterMargin(PDF_MARGIN_FOOTER);

        // Set auto page breaks
        $pdf->SetAutoPageBreak(TRUE, PDF_MARGIN_BOTTOM);

        // Add a page
        $pdf->AddPage();

        // Set font
        $pdf->SetFont('times', '', 12);

        // Add content to the PDF
        $pdf->MultiCell(0, 10, $content, 0, 'L');

        // Output the PDF to a variable
        $pdf_content = $pdf->Output('', 'S');

        return $pdf_content;
    }

    function send_pdf_email($pdf_files, $languages, $person_name) {
        $to = '[email protected]';
        $subject = 'New Form Submission'; 
        $message = 'Please find the attached PDFs for the following languages: ' . implode(', ', $languages);

        $attachments = array();
        $current_date = date('Y-m-d');

        // Loop through PDF files and attach them
        foreach ($pdf_files as $language => $pdf_content) {
            $pdf_file_name = "New_Form_{$person_name}_{$current_date}_{$language}.pdf";
            $attachments[$pdf_file_name] = $pdf_content;
        }

        // Send the email
        wp_mail($to, $subject, $message, '', $attachments);
    }

    function send_test_email($person_name) {
        $to = '[email protected]';
        $subject = 'Test Email';
        $message = "This is a test email sent from your WordPress plugin. {$person_name}";
        $result = wp_mail($to, $subject, $message);

    }



    ?>

我尝试在我的插件代码中使用 WordPress 的wp_mail功能发送测试电子邮件。我希望测试电子邮件能够成功发送到指定的收件人电子邮件地址，并看到消息“测试电子邮件已成功发送”。但是，当我在WP Forms的“设置/通知”中设置“发送电子邮件”选项时，我只能通过WP Forms功能接收电子邮件。我确实安装了WP Mail SMTP插件。WP Mail SMTP插件的描述是： 将 wp_mail（） 函数重新配置为使用 Gmail/Mailgun/SendGrid/SMTP 而不是默认的 mail（），并创建一个选项页面来管理设置。

另一方面，当我的插件处于活动状态时，它会阻止显示确认消息。