PHP的$ _FILES [“文件”] [“名称”]功能不正常

问题描述

上次我在这里问了一个问题，我搞砸了，但我想我现在明白了。请让我知道，如果我可以问得更好：D

我正在使用PHP的HTML表单，并试图获取文件名。我使用Bootstrap进行格式化，我的Form看起来像这样：

 < form role =formclass =form -horizo​​ntalaction =<？php echo $ _SERVER ['PHP_SELF']; ？>方法= POST > 
< div class =form-group> 
< label for =fileclass =col-sm-3 control-label> Picture< / label> 
< div class =col-sm-9> 
< input style =margin-top：7.5px; type =filename =fileid =filerequired> 
< / div> 
< / div> 
< button type =submitclass =btn btn-success btn-lg btn-block>提交< / button> 
< / form> 
  

然后在代码后直接输入：

 <？php echo文件：。 $ _FILES [ 文件] [ 名称]; ？> 
  

第一次访问页面时输出结果（这是正确的）：

 档案：
  

然而，我选择了一个文件，并在最后提交php代码仍然只输出文件：

任何人都知道这是为什么发生？

非常感谢您

解决方案

您错过了 enctype =您的< form> 标记中的multipart / form-data属性。没有它，文件将不会上传。

 < form enctype =multipart / form-datarole =form
 class =form-horizo​​ntalaction =<？php echo $ _SERVER ['PHP_SELF']; ？>方法= POST > 
  

Last time I asked a question here I messed up but I think I got it now. Please let me know if I can ask better :D

I am using an HTML form with PHP and am trying to get a file name. I am using Bootstrap for the formatting, my Form looks like this:

<form role="form" class="form-horizontal" action=<?php echo $_SERVER['PHP_SELF']; ?> method="post">
  <div class="form-group">
    <label for="file" class="col-sm-3 control-label">Picture</label>
    <div class="col-sm-9">
      <input style="margin-top: 7.5px;" type="file" name="file" id="file" required>
    </div>
  </div>
  <button type="submit" class="btn btn-success btn-lg btn-block">Submit</button>
</form>

And then directly after that code I have this:

<?php echo "File: " . $_FILES["file"]["name"]; ?>

Which upon first visiting the page outputs just (which is correct):

File:

However after I select a file and hit submit the php code at the end still only outputs "File: "

Anyone know why this is happening?

Thank you very much

解决方案

You're missing your enctype="multipart/form-data" attribute in your <form> tag. Without it the file will not upload.

<form enctype="multipart/form-data" role="form"
    class="form-horizontal" action=<?php echo $_SERVER['PHP_SELF']; ?> method="post">

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