HTML表单文件上传不起作用，$ _POST不转发数据

Maybe it is just too early here, but can't figure out the problem... I have made several forms already, but this time for a reason I can't forward the data of my file input.

Here is my index.php (where the form is):

<form action="confirm.php" method="post" enctype="multipart/form-data">
<input type="file" name="file1">
<input type="submit" name="order">
</form>

Here is my confirm.php:

<?php
if (isset($_POST['order'])) {

    $file       = $_POST['file1'];

    echo $file;

}
?>

And I get the following error message:

Notice: Undefined index: file1 in /Applications/MAMP/htdocs/.../confirm.php on line 4

I seriously don't understand what is the problem. This is a rock easy form and I think it is correct. Can you please help me with this huge issue? :DD Btw. the form proceeds all the other input data except the file.

Thanks, Matthew

Since your input type is file so you can not access by $_POST

`type="file"` // Not Accessible through `$_POST` 

Php is providing separate http group $_FILES for getting the value of input which type should be file like this type="file"

So you can you get the input value by $_FILES

if(isset($_POST['order'])){
   $Input_File = $_FILES['file1'];
   $Input_File_Name = $Input_File['name'];
   $Input_File_type = $Input_File['type'];
   $Input_File_tmp_name = $Input_File['tmp_name'];
   $Input_File_size = $Input_File['size'];

}

You can't use $_POST to access the value of <input type="file" />. You can access this by using $_FILES

try this:

<?php
if (isset($_POST['order'])) {
 $file = $_FILES["file1"]["name"];
 echo $file;
}
?>

you are using multipart/form data but you are giving the file name field only. It will be used like that.

<?php
if (isset($_POST['order'])) {

    $file       =$_FILES['file1']['name'];


    echo $file;

}
?>