Swiftmailer在SetBody上抛出错误

Question

我使用SwiftMailer Libs时遇到此错误。

$message_body = "Body of message";

$transport = send_mail_transport();

//Create the Mailer using your created Transport
$mailer = Swift_Mailer::newInstance($transport);

//Create the message
$message = Swift_Message::newInstance();


  $message->setBody('$message_body'); //displays $message_body in mail client
  $message->setBody($message_body); //throws parse error in browser
  $message->setBody('Body of message'); //Works well. displays Body of message in mail client

//我打算从变量中获取值时会出现什么问题？

由于

Answer 1

确定。弄清楚了 将其更改为

$message->setBody("$message_body");

有趣的是，他们的手册没有记录这一点。