提交未定义值的 PHP 表单

Question

正如我的标题所说，我的电子邮件表单在电子邮件中提交“未定义”。让我从一些代码开始......

HTML:

<form action="contactform.php" method="post" enctype="multipart/form-data" name="contact">
        <input name="name" type="text" value="Name" onfocus="if(this.value=='Name') this.value='';" />
        <input name="email" type="text" value="Email address" onfocus="if(this.value=='Email address') this.value='';" />
        <input name="phonemodel" type="text" value="Phone model" onfocus="if(this.value=='Phone model') this.value='';" />
        <textarea name="comments" cols="" rows="" style="height:130px;" onfocus="if(this.value=='Type your message here.') this.value='';" >Type your message here.</textarea>
        <input type="image" name="button" value="Submit" src="../media/btn_play_submit.png" style="margin-right:5px; margin-top:12px;" />
</form>

PHP:

<?php
  if(isset($_POST['name'])) {

    $to = 'MYEMAILHERE';
    $headers = "From: blahblahblah\r\n";
    $subject = "Online Contact Submission Received\r\n";

    $name = $_POST['name'];
    $email = $_POST['email'];
    $phone = $_POST['phonemodel'];
    $comments = $_POST['comments'];

    $message .= "Name: " . $name . "\r\n";
    $message .= "Email: " . $email . "\r\n";
    $message .= "Phone Model: " . $phone . "\r\n";
    $message .= "Comments: " . $comments . "\r\n";

    mail($to, $subject, $message, $headers);
  }
?>

我收到的电子邮件看起来像这样(是的，我在字段中输入了文本...):

Name: undefined
Email: undefined
Phone Model:
Comments: undefined

我注意到的第一件事:“电话型号”不像其他型号那样说“未定义”。第二，为什么其他人说的是 undefined 而不是我输入的文本？

提前致谢。

Answer 1

尝试改变

$message .= "姓名:". $名字。 "\r\n";

到

$message = "姓名:". $名字。 "\r\n";

编辑:示例如下:

if(isset($_POST['name'])) {
    var_dump($_POST);
    exit;