PHP电子邮件联系表格，主题不工作的下拉框

Question

我有一个联系表单将用户输入值邮寄到一个电子邮件地址。它工作正常，它会发送除主题以外的所有信息，我已将其作为带有几个选项的下拉框提供。我想将选定的选项设置为电子邮件主题。

<select name="subject"> 
    <option value="1" selected>1</option> 
    <option value="2">2</option> 
    <option value="3">3</option> 
    <option value="4">4</option> 
    <option value="5">5</option> 
</select> 


<?php 
    $email  = $_POST['email']; 
    $message = $_POST['message']; 
    $name  = $_POST['name']; 
    $subject = $_POST['subject']; 
    $phone  = $_POST['phone']; 
    $to   = 'emailaddress.co.uk'; 
    $from  = $email; 
    $header  = "From:" . $from; 
    $msgsubject = "$subject message from $name"; 
    $commessage = "Name: $name 

    Email: $email 

    Phone Number: $phone 

    Subject: $subject 

    Message: $message"; 

    mail($to, $msgsubject, $commessage, $header); 
?> 

Answer 1

<select name="subject]"> 

subject]？真？

（提示：无）