为什么$ mail-> body = $ message的值为空？

Question

我试图在消息中添加文本终于可以了，但是在显示$message的表单中添加了错误消息之后，添加了null。

我正在使用ajax进行表单提交。一切正常，但邮件无法正常工作

  

“邮件”：“邮件错误：邮件正文为空”

<?php
header('Content-Type: application/json');
require("phpmailer/class.phpmailer.php");


$c_name = $_POST['name'];
$c_email = $_POST['email'];
$c_message = $_POST['message'];

$message = '<ul><li>' . $c_name . "</li>";
$message .= '<li>' . $c_email . "</li>";
$message .= '<li>' . $c_message . "</li></ul>";

$mail = new PHPMailer();

$mail->IsSMTP();             // set mailer to use SMTP
$mail->Host = "smtp.gmail.com";  // specify main and backup server
$mail->SMTPAuth = true;     // turn on SMTP authentication
$mail->Username = "jswan";  // SMTP username
$mail->Password = "secret"; // SMTP password

$mail->From = "from@example.com";
$mail->FromName = "Mailer";
$mail->AddAddress("josh@example.net", "Josh Adams");
$mail->Port = 587; 
$mail->SMTPSecure = 'tls';


$mail->WordWrap = 50;                                 // set word wrap to 50        // add attachments

$mail->IsHTML(true);                                  // set email format to HTML

$mail->Subject = "Enquiry";
$mail->Body = preg_replace('/\[\]/','',$message);
//$mail->Body    = $message; //var_dump($message) showing null
$mail->AltBody = $message;

//$mail->AltBody = "This is the body in plain text for non-HTML mail clients";

if (!$mail->send()) { 
$result = array('status'=>"error", 'message'=>"Mailer Error: ".$mail->ErrorInfo);//
echo json_encode($result);
} else {
$result = array('status'=>"success", 'message'=>"Message sent.");
echo json_encode($result);
}
exit;
?>

form.js

$(document).ready(function() 
{


$('#reused_form').submit(function(e)
  {
    e.preventDefault();

    var formData = $(this).serialize();
    debugger;

        $.ajax({
            type: "POST",
            url: 'form/index.php',
            dataType: "json",
            data: formData,
            processData: false,
            contentType: false,
            cache: false ,
            success: function(result) {
            console.log(result);
            if(result.status=="success"){
                $('#success_message').show();
            }else if(result.status=="error"){
            $('#error_message').show();
            }
            },


        });

  });   
});