提交时无法在数据库中插入时间戳(Can't insert timestamp in database when submitting)

 我有这个表单和流程页面。 
 在表单页面上，有两个隐藏的输入id和reg_time值在“结束”时设置为null，当执行没有问题但是在行reg_time我得到的函数00:00:00在表用户中设置的时间戳。 有什么建议吗？ 
 
  function post($POST)
 {   
   $POST = array_map('trim', $_POST);
   $hash = "$2y$10$";
   $salt = "nekiludistringzahash22";
   $his = $hash . $salt;
   $POST['pass'] = crypt($_POST['pass'],$his);
   return $POST;  
 }

 $sql = "insert into users values(:" . implode(",:", array_keys(post($_POST))) . ");";




try{
     $db = new PDO('mysql:host=localhost;charset=utf8;dbname=dbname','root','');
     $db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

 }catch (PDOException $e) 

{

     die("Conn problem " . $e->getMessage());
} 

$reg = $db->prepare($sql);
$reg->execute(post($_POST));
 
 和形式 
 
 <form action="exp2.php" method="post">
<input type="hidden" name="id" value="null">

<input type="text"name="uname">
<input type="text"name="pass">
<input type="text"name="name">
<input type="text"name="lname">
<input type="submit">

<input type="hidden" name="reg_time" value = "null">
</form>

I have this form and process page.
 On a form page, there are two hidden inputs id and reg_time values set to null at the "end " when executing no problem with id but under the row reg_time I get 0000-00-00 00:00:00 timestamp set in table users. Any suggestions why?
 
  function post($POST)
 {   
   $POST = array_map('trim', $_POST);
   $hash = "$2y$10$";
   $salt = "nekiludistringzahash22";
   $his = $hash . $salt;
   $POST['pass'] = crypt($_POST['pass'],$his);
   return $POST;  
 }

 $sql = "insert into users values(:" . implode(",:", array_keys(post($_POST))) . ");";




try{
     $db = new PDO('mysql:host=localhost;charset=utf8;dbname=dbname','root','');
     $db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

 }catch (PDOException $e) 

{

     die("Conn problem " . $e->getMessage());
} 

$reg = $db->prepare($sql);
$reg->execute(post($_POST));
 
and form
 
 <form action="exp2.php" method="post">
<input type="hidden" name="id" value="null">

<input type="text"name="uname">
<input type="text"name="pass">
<input type="text"name="name">
<input type="text"name="lname">
<input type="submit">

<input type="hidden" name="reg_time" value = "null">
</form>

原文：https://stackoverflow.com/questions/38418099