PHP上传如果ISSET总是说它是？ [英] PHP Upload IF ISSET always says it is?

问题描述

好吧，我的代码有一些奇怪的问题。我正在尝试使用照片上传文本上传表单。现在，我需要检查照片是否已上传或仅插入文字。

简化代码如下所示：

  if（isset（$ _FILES ['image']））{
 echo'yes'; 
 
 
}其他{
 echo'no'; 
} 
  

表格如下：

 < form action =method =postenctype =multipart / form-dataclass =contact-form> 
< form action =method =postenctype =multipart / form-dataclass =contact-form> 
 
 
< label for =title>< strong> Title< / strong> （需要）LT /标签> 
< input type =textname =titlevalue =required> 
 
 
< label>< span class =small>< strong>添加照片< / strong>< / span>< / label> 
< input type =filename =image/> 
 
 
< input type =submitnamesubmitvalue =Submit> 
< / form> 
  

现在，基本上，我要做的是检查文件是否附加，因为我需要一个备用选项，以相同的形式发布没有照片的帖子;但是，问题在于，如果附加或不附加，它总是说YES。

帮助，任何人。

解决方案

要检查文件是否已上传，如何：

  if （！file_exists（$ _ FILES ['image'] ['tmp_name']）||！is_uploaded_file（$ _ FILES ['image'] ['tmp_name']））
 {
 echo'No upload' ; 
} 
其他
 {
 //您的文件已上传
} 
  

is_uploaded_file （） 是这里的选择，请查看文档。

$ _ FILES 是一个文件数组，第二维中自动为数组第一维中的每个文件提供一个 ['tmp_name'] 键，值是它的临时位置。

显然你需要在临时文件上使用 move_uploaded_file（）。 / p>

OK, i have some kind of strange problem with my code. I'm trying to make uploading form with text along photos. Now, I need to check if the photo is uploaded or the text is inserted only.

The simplified code looks like this:

if (isset ($_FILES['image'])){
echo 'yes';


} else {    
echo 'no';      
}

the form looks like:

   <form action=""  method="post" enctype="multipart/form-data" class="contact-form">
   <form action=""  method="post" enctype="multipart/form-data" class="contact-form">


   <label for="title"><strong>Title</strong> (required)</label>
   <input type="text" name="title" value="" required>


   <label><span class="small"><strong>Add a photo</strong></span></label>
   <input type="file" name="image"/>


   <input type="submit" name"submit" value="Submit">    
   </form>

Now, basically, what I'm trying to make is a check if file is attached or not, because I need an alternate option for posting posts without photos, in the same form; but, the problem is that no mather if it is attached or not it always says YES.

Help, anyone.

解决方案

To check if the file has been uploaded, how about:

if (!file_exists($_FILES['image']['tmp_name']) || !is_uploaded_file($_FILES['image']['tmp_name'])) 
{
    echo 'No upload';
}
else
{
    // Your file has been uploaded
}

is_uploaded_file() is the choice here, check the docs out for it.

$_FILES is an array of files, and each file in the first dimension of the array is automatically given a ['tmp_name'] key in the second dimension, with the value being it's temporary location.

Obviously you then need to use move_uploaded_file() on the temporary file.

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