Why am I getting this error?

[Dirt_Diver]

I'm trying to upload a file and it's telling me I have the wrong extension.

Now I'm blocking everything but the extension but I'm giving it the right file and it's not allowing it through, why??

The file I am tring to upload is
C:\Users\me\my file.atn

The error I am getting is:
The file you are attempting to upload has the wrong extension.

$userfile = $_FILES['action_id']['name'];
    $file_size = $_FILES['action_id']['size'];
    $file_temp = $_FILES['action_id']['tmp_name'];
    $file_err = $_FILES['action_id']['error'];
    $path = '../../downloads/photoshop/temp_actions/';
    
    // Create a new file name
    // This is so if other files on the server have the same name, it will be renamed
    $randomizer = rand(0000, 9999);
    $file_name = $randomizer.$userfile;
    
    // Get the file type
    // Using $_FILES to get the file type is sometimes inaccurate, so we are going
    // to get the extension ourselves from the name of the file
    // This also eliminates having to worry about the MIME type
    $file_type = $userfile;
    $file_type_length = strlen($file_type) - 3;
    $file_type = substr($file_type, $file_type_length);

    if(!empty($userfile)) {
        echo 'File Uploaded Information
        <ul>
        <li>File being uploaded: ' .$userfile. '</li>
        <li>File Type: .' .$file_type.'</li>
        <li>File Size: ' .$file_size. 'KB </li>
        <li>File Error: ' . $file_err. '</li>
        </ul>';

        // limit the size of the file to 20MB
        if($file_size > 20971520) {
            echo '<font color="#F0B80F"><b>The file you are trying to upload is too large. Please restrict your file to at least 20MB </b></font><BR />';
            exit();
        }

        // Set allowed file types
        // Set case of all letters to lower case
        $file_type = strtolower($file_type);
        $files = array();
        $files[] = 'atn'; 
        $files[] = 'aaa'; 
        $files[] = 'bbb'; 
        // Search the array for the allowed file type
        $key = array_search($file_type, $files);
        if($key) {
            echo '<b>The file you are uploading is allowed. </b><br />';
        } else {
            echo '<font color="#F0B80F"><b>The file you are attempting to upload has the wrong extension. </b></font><br />';
            exit();
        }

// Check for errors and upload the file
$error_count = count($file_error);
if($error_count > 0) {
        for($i = 0; $i <= $error_count; ++$i) {
            echo $_FILES['action_id']['error'][$i];
        }
} else {
        if(move_uploaded_file($file_temp, '../../downloads/photoshop/temp_actions/' .$file_name.'')) {
            echo 'Thank you for your contribution. You should see your action on the site within 24 hours.';
        } else {
            echo '<font color="#F0B80F"><b>Whoops look like there was a mistake during your upload. Please try again.</b></font>';
        }
}

    } else {
        echo '<font color="#F0B80F"><b>No file has been selected.</b></font>';
    } 

[saikishore]

hi...
i think its file name problem...

ur file name having space in the middel of the name...

(or)

where u mentioned ur file extentions.....atn is not the file extention(what i know)...try ro check again..

[codeexploiter]

atn is not the file extention(what i know)

http://www.liutilities.com/products/...ary/files/ATN/

[Dirt_Diver]

So because windows doesn't know the file, php can't process it?

[Dirt_Diver]

I just tried to change the extensions allowed to a jpg and tried to upload a jpg and I got the same error.
I even tried to

$files[] = 'image/jpg'; 

still not working

[Nile]

Its jpeg.

[Schmoopy]

If it is jpeg, then you're going to need to restructure your code - at the moment you're taking away 3 from the string to be left with the extension. That's not going to work if you have a file like jpeg which is 4 characters long =/

[Dirt_Diver]

Well I did jpg as a test just to see if it would allow the file to be uploaded. but it didnt work.

The file I need ends with .atn,

Is there anything wrong with the code?

[Schmoopy]

Try what Nile said, and make it jpeg instead of jpg.

[Dirt_Diver]

Try what Nile said, and make it jpeg instead of jpg.

No, .jpeg did not work. And yes I changed
strlen($file_type) - 4;