使用 PHP 和 Sendgrid API 发送表单文件附件

Question

下面是一个使用 phpmailer 通过 php sendmail 发送电子邮件的脚本。我想使用 Sendgrid 的 API 发送电子邮件，我需要进行哪些更改才能使其与 Sendgrid 一起使用？

<?php

require('PHPMailer/class.phpmailer.php');

if(isset($_POST['email'])) {
    $name = $_POST['name']; // required
    $position = $_POST['position']; // required
    $email_from = $_POST['email']; // required
    $phone = $_POST['phone']; // not required
    $comments = $_POST['comments']; // required

    $email_to = "careers@site.com";
    $name_to = "careers";
    $email_subject = "Job Application from ".$name." for ".$position;

  if($position != null)
    function clean_string($string) {
      $bad = array("content-type","bcc:","to:","cc:","href");
      return str_replace($bad,"",$string);
    }
     $email_message = "";
    $email_message .= "Name: ".clean_string($name)."\n";
    $email_message .= "Position: ".clean_string($position)."\n";
    $email_message .= "Email: ".clean_string($email_from)."\n";
    $email_message .= "Phone: ".clean_string($phone)."\n";
    $email_message .= "Comments: ".clean_string($comments)."\n";

    $allowedExts = array("doc", "docx", "xls", "xlsx", "pdf");
$temp = explode(".", $_FILES["file"]["name"]);
$extension = end($temp);
if ((($_FILES["file"]["type"] == "application/pdf")
|| ($_FILES["file"]["type"] == "application/msword")
|| ($_FILES["file"]["type"] == "application/excel")
|| ($_FILES["file"]["type"] == "application/vnd.ms-excel")
|| ($_FILES["file"]["type"] == "application/x-excel")
|| ($_FILES["file"]["type"] == "application/x-msexcel")
|| ($_FILES["file"]["type"] == "application/vnd.openxmlformats-officedocument.wordprocessingml.document")
|| ($_FILES["file"]["type"] == "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"))

&& in_array($extension, $allowedExts))
  {
  if ($_FILES["file"]["error"] > 0)
    {
    echo "<script>alert('Error: " . $_FILES["file"]["error"] ."')</script>";
    }
  else
    {
        $d='upload/';
        $de=$d . basename($_FILES['file']['name']);
    move_uploaded_file($_FILES["file"]["tmp_name"], $de);
$fileName = $_FILES['file']['name'];
    $filePath = $_FILES['file']['tmp_name'];
     //add only if the file is an upload
     }
  }
else
  {
  echo "<script>alert('Invalid file')</script>";
  }

// create email headers
$headers = 'From: '.$email_from."\r\n".
'Reply-To: '.$email_from."\r\n" .
'X-Mailer: PHP/' . phpversion();
//Create a new PHPMailer instance
$mail = new PHPMailer();
//Set who the message is to be sent from
$mail->SetFrom($email_from, $name);
//Set an alternative reply-to address
$mail->addReplyTo($email_from, $name);
//Set who the message is to be sent to
$mail->addAddress($email_to, $name_to);
//Set the subject line
$mail->Subject = $email_subject;
//Read an HTML message body from an external file, convert referenced images to embedded, convert HTML into a basic plain-text alternative body
$mail->MsgHTML($email_message);
//Replace the plain text body with one created manually
$mail->AltBody = $email_message;
//Attach an image file
$mail->AddAttachment($_FILES['file']['tmp_name'], $_FILES['file']['name']);
//Send the message, check for errors
if(!$mail->Send()) {
  echo "<script>alert('Mailer Error: " . $mail->ErrorInfo."')</script>";
} else {
  echo "<script>alert('Your request has been submitted. We will contact you soon.')</script>";
}
}
?>

Answer 1

作为hackeronesaid，要更改您的代码以使用SendGrid 和PHPMailer 发送，您需要在实例化PHPMailer 后更新您的代码以包含SMTP 设置。以下设置适用于 SendGrid：

// This should go somewhere after $mail = new PHPMailer();
$mail->isSMTP();                                      // Set mailer to use SMTP
$mail->Host = 'smtp.sendgrid.net';                    // Specify server
$mail->SMTPAuth = true;                               // Enable SMTP authentication
$mail->Username = 'your_sendgrid_username';           // SMTP username
$mail->Password = 'your_sendgrid_password';           // SMTP password
$mail->Port = 587;                                    // Recommended Port
$mail->SMTPSecure = 'tls';                            // Enable encryption, 'ssl'

Answer 2

以下是phpmailer的代码，你可以在实例化phpmailer后指定sendgrid smtp参数。

$mail->isSMTP();                                      // Set mailer to use SMTP
$mail->Host = 'smtp1.example.com;smtp2.example.com';  // Specify main and backup server
$mail->SMTPAuth = true;                               // Enable SMTP authentication
$mail->Username = 'jswan';                            // SMTP username
$mail->Password = 'secret';                           // SMTP password
$mail->SMTPSecure = 'tls';                            // Enable encryption, 'ssl' also accepted