Getting the File Extensions using PHP

[MrPantsTm]

What I would like to do is get the file extension from a file that was just uploaded to put as a field in my database. I've tried the below code but thats dependent on how long the filename is. I would like it to automatically get the extension without knowing how long the file is. Has anyone done this or know of an answer. TIA!

$extension = $basefilename;
$extension = $extension[extension];

 

[karnaf]

would this -

$temp = explode('.', $basefilename);
$extension = $temp[count($temp)-1];

work?

 

[MrPantsTm]

It works, thank you.

I also tried:

$temp = explode('.', $basefilename);
echo $temp[1];

but my solution will crumble if theres more than 1 period in the file name. Thanks for all your help.