Re: substr?

On Jun 17, 2008, at 8:01 AM, Dan Shirah wrote:

The code I'm having issues with is this:

      $filename = $_FILES['userfile']['name']; // Get the name of the file

(including file extension).

      $ext = substr($filename, strpos($filename,'.'),

strlen($filename)-1); // Get the extension from the filename. All I want to do is grab the file extension and verify that it is a .zip or a .pdf etc. file. This is working for small files (under a few megs) but for some reason it fails when I get bigger. I have increased the allowed memory size to 50 MB's I'm testing with a 44 MB file right now.

I'm not an expert on pulling in and reading files, but if all you want is the last three characters of a file name, couldn't you just do something like: $extension = substr($filename, -3);

What about file extensions that are not 3 characters in length? This should be updated to: <?php $ext = substr ($filename, strrpos ($file, '.')+1); ?> Sorry, I know this doesn't contribute to the original problem, but it does address another... ;) ~Philip

if ($extension = "pdf" || $extension = "zip") { echo "The file is a PDF or ZIP."; } else { echo "Incorrect file type."; } ?? Or maybe you are saying you want it to perform this check while the user is attempting to upload the file and not after it has been uploaded?