Determine file type

[Jabbamonkey]

I want to know how to determine the file type of a file on my server. I managed to upload a file somewhere, but in order for me to do anything else with it, I want to detemine the file type.

How do I go about this?

Jabbamonkey



NOTE TO FORUM ADMIN:
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I posted an earlier message, which ended up asking how to delete a specific file from a server...

http://www.codingforums.com/showthread.php?s=&threadid=3738

This message isn't asking how to delete a file from the server (or asking how to send an attachment). It's asking how to determine the file type (the file type in the previous post was a defined variable)

[Socraties]

a quick dirty way to determine a file extension is this way

<?
$newvalue = substr($filename,-3);
?>

This will allow you to see what the extension is. It is a quick way maybe not the best way to do this but it works.