Re: substr?

> > 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); 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?