在 php 中从 html ajax 表单创建 PDF 文件

Question

我有一个简单的联系表格。它通过 AJAX 发送电子邮件。工作正常。

现在我需要从这个表单的结果中创建 PDF 文件并将其下载给像here 这样的用户

所以html形式：

<form id="contact-form">
    <input type="hidden" name="action" value="contact_send" />
    <input type="text" name="name" placeholder="Your name..." />
    <input type="email" name="email" placeholder="Your email..." />
    <textarea name="message" placeholder="Your message..."></textarea>
    <input type="submit" value="Send Message" />
</form>

在functions.php中我有发送电子邮件的功能：

function sendContactFormToSiteAdmin () {

  try {
    if (empty($_POST['name']) || empty($_POST['email']) || empty($_POST['message'])) {
      throw new Exception('Bad form parameters. Check the markup to make sure you are naming the inputs correctly.');
    }
    if (!is_email($_POST['email'])) {
      throw new Exception('Email address not formatted correctly.');
    }

    $subject = 'Contact Form: '.$reason.' - '.$_POST['name'];
    $headers = 'From: My Blog Contact Form <contact@myblog.com>';
    $send_to = "contact@myblog.com";
    $subject = "MyBlog Contact Form ($reason): ".$_POST['name'];
    $message = "Message from ".$_POST['name'].": \n\n ". $_POST['message'] . " \n\n Reply to: " . $_POST['email'];

    if (wp_mail($send_to, $subject, $message, $headers)) {
      echo json_encode(array('status' => 'success', 'message' => 'Contact message sent.'));
      exit;
    } else {
      throw new Exception('Failed to send email. Check AJAX handler.');
    }
  } catch (Exception $e) {
    echo json_encode(array('status' => 'error', 'message' => $e->getMessage()));
    exit;
  }


}
add_action("wp_ajax_contact_send", "sendContactFormToSiteAdmin");
add_action("wp_ajax_nopriv_contact_send", "sendContactFormToSiteAdmin");

所以在 footer.php 我有一个脚本 ajax 处理程序：

jQuery(document).ready(function ($) {
    $('#contact-form').submit(function (e) {
      e.preventDefault(); // Prevent the default form submit
      var $this = $(this); // Cache this
      $.ajax({
        url: '<?php echo admin_url("admin-ajax.php") ?>', // Let WordPress figure this url out...
        type: 'post',
        dataType: 'JSON', // Set this so we don't need to decode the response...
        data: $this.serialize(), // One-liner form data prep...
        beforeSend: function () {},
        error: handleFormError,
        success: function (data) {
          if (data.status === 'success') {
           handleFormSuccess();
          } else {
            handleFormError(); // If we don't get the expected response, it's an error...
          }
        }
      });
    });
});

一切都很好。但我不明白我必须在哪里粘贴创建 PDF 的代码，我曾尝试将其粘贴到 sendContactFormToSiteAdmin php 函数中，但没有成功。

在this example 中，我需要将此代码完全粘贴到sendContactFormToSiteAdmin php 函数中：

ob_start();
?>

<h1>Data from form</h1>
<p>Name: <?php echo $name;?></p>
<p>Email: <?php echo $email;?></p>

<?php 
$body = ob_get_clean();
$body = iconv("UTF-8","UTF-8//IGNORE",$body);
include("mpdf/mpdf.php");
$mpdf=new \mPDF('c','A4','','' , 0, 0, 0, 0, 0, 0); 
$mpdf->WriteHTML($body);
$mpdf->Output('demo.pdf','D');

但我不明白如何使用 ajax 响应来做到这一点。

编辑 正如 Shoaib Zafar 评论的那样，如果可以将 pdf 文件作为电子邮件的附件通过电子邮件发送，那当然对我来说是最好的。

Answer 1

要将 PDF 作为附件通过电子邮件发送，您需要更改电子邮件发送功能。

function sendContactFormToSiteAdmin () {

  try {
    if (empty($_POST['name']) || empty($_POST['email']) || empty($_POST['message'])) {
      throw new Exception('Bad form parameters. Check the markup to make sure you are naming the inputs correctly.');
    }
    if (!is_email($_POST['email'])) {
      throw new Exception('Email address not formatted correctly.');
    }

ob_start();
?>
<h1>Data from form</h1>
<p>Name: <?php echo $_POST['name'];?></p>
<p>Email: <?php echo $_POST['email'];?></p>
<?php 
$body = ob_get_clean();
// Supposing you have already included ("mpdf/mpdf.php");
$mpdf=new \mPDF('c','A4','','' , 0, 0, 0, 0, 0, 0); 
$mpdf->WriteHTML($body);
$pdf_content = $mpdf->Output('', 'S');
$pdf_content = chunk_split(base64_encode($pdf_content));
$uid = md5(uniqid(time()));
$filename = 'contact.pdf';

    $subject = 'Contact Form: '.$reason.' - '.$_POST['name'];
    $message = "Message from ".$_POST['name'].": \n\n ". $_POST['message'] . " \n\n Reply to: " . $_POST['email'];
    $header = 'From: My Blog Contact Form <contact@myblog.com>';

$header .= "--".$uid."\r\n";
$header .= "Content-type:text/plain; charset=iso-8859-1\r\n";
$header .= "Content-Transfer-Encoding: 7bit\r\n\r\n";
$header .= $message."\r\n\r\n";
$header .= "--".$uid."\r\n";
$header .= "Content-Type: multipart/mixed; boundary=\"".$uid."\"\r\n\r\n";  
$header .= "Content-Type: application/pdf; name=\"".$filename."\"\r\n";
$header .= "Content-Transfer-Encoding: base64\r\n";
$header .= "Content-Disposition: attachment; filename=\"".$filename."\"\r\n\r\n";
$header .= $pdf_content."\r\n\r\n";
$header .= "--".$uid."--";

    $send_to = "contact@myblog.com";
    $subject = "MyBlog Contact Form ($reason): ".$_POST['name'];

    if (wp_mail($send_to, $subject, $message, $header)) {
      echo json_encode(array('status' => 'success', 'message' => 'Contact message sent.'));
      exit;
    } else {
      throw new Exception('Failed to send email. Check AJAX handler.');
    }
  } catch (Exception $e) {
    echo json_encode(array('status' => 'error', 'message' => $e->getMessage()));
    exit;
  }


}

我不太了解 wp_email 函数的工作原理，但从技术上讲，这段代码应该可以工作，你只需要重构它。 您也可以在官方文档中找到它以了解更多信息mPDF Example #3