PHP Upload IF ISSET 总是这么说?

问题描述

好的，我的代码有一些奇怪的问题.我正在尝试使用照片上的文字上传表格.现在，我需要检查是上传照片还是仅插入文本.

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.

简化后的代码如下所示:

The simplified code looks like this:

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


} else {    
echo 'no';      
}

表格如下:

   <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>

现在，基本上，我要做的是检查文件是否附加，因为我需要一个替代选项来以相同的形式发布没有照片的帖子；但是，问题是，无论是否连接，它总是说是.

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.

帮助，任何人.

推荐答案

要检查文件是否已经上传，如何:

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()是这里的选择，请查看文档.

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

$_FILES 是一个文件数组，数组第一维的每个文件在第二维自动赋予一个['tmp_name']键，值是它的临时位置.

$_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.

显然你需要在临时文件上使用 move_uploaded_file().

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

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