HTML表单POST为空 [英] HTML Form POST is null

问题描述

所以我试图简单地将一个数据字段从一个表单发送到一个php文件。以下是我的表格。我也发布了我的PHP代码。它一直返回$ username为空。我试过后/得到，它似乎并不重要。

HTML：

 < form action ='http：//k9minecraft.tk/scripts/adduser.php'method ='POST'> 
< table> 
< tr> 
< td>名字：< / td> 
< td>< input type ='text'id ='first'>< / td> 
< / tr> 
< tr> 
< td>姓氏：< / td> 
< td>< input type ='text'id ='last'>< / td> 
< / tr> 
< tr> 
< td>电子邮件地址：< / td> 
< td>< input type ='text'id ='email'>< / td> 
< / tr> 
< tr> 
< td> Minecraft名称：< / td> 
< td>< input type ='text'name ='user'>< / td> 
< / tr> 
< tr> 
< td>< input type ='submit'value ='发送'>< / td> 
< td>< input type ='reset'value ='重置'>< / td> 
< / tr> 
< / table> 
< / form> 
  

PHP：

 <？php 
 print_r（$ _ POST）; 
 if（isset（$ _ POST ['user']））{
 $ username = $ _POST ['user']; 
 echo $ username; 
 echo'username is not null'; 
} 
？> 
  

解决方案

此代码正在工作。如果 $ username 被张贴或不张贴，您需要添加一些条件。

类似这样的：

  if（count（$ _ POST））{
 $ username =''; 
 if（isset（$ _ POST ['user']））{
 $ username = $ _POST ['user']; 
 if（$ username == null ||！$ username）
 echo'username is null'; 
 echo strlen（$ username）; 
 echo $ username; 
} 
 
} 
  

so I'm trying to simply send one field of data from a form to a php file. Below is my form in a table. I also posted my php code. It keeps returning that $username is null. Ive tried post/get and it doesn't seem to matter.

HTML:

<form action='http://k9minecraft.tk/scripts/adduser.php' method='POST'>
<table>
<tr>
<td>First Name:</td>
<td><input type='text' id='first'></td>
</tr>
<tr>
<td>Last Name:</td>
<td><input type='text' id='last'></td>
</tr>
<tr>
<td>Email:</td>
<td><input type='text' id='email'></td>
</tr>
<tr>
<td>Minecraft Name:</td>
<td><input type='text' name='user'></td>
</tr>
<tr>
<td><input type='submit' value='Send'></td>
<td><input type='reset' value='Reset'></td>
</tr>
</table>
</form>

PHP:

<?php
print_r($_POST);
    if(isset($_POST['user'])){
        $username = $_POST['user'];
        echo $username;
        echo 'username is not null';
        }
?>

解决方案

This code is working. You need to add some condition, that checks, if $username is posted or not.

Something like that:

if(count($_POST)){
    $username ='';
    if(isset($_POST['user'])){
        $username = $_POST['user'];
    if ($username==null || !$username)
         echo 'username is null';
     echo strlen($username);
     echo $username;
   }

 }

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