Rename Thumbnail?

[srarcade]

I would like to rename a jpeg file ($newfile_name) that is uploaded to add '_thumb' on the end before '.jpg'. The upload part works fine, I just need to figure out how to rename it. Heres a snippit of what I got:

 //SAVE TO THUMBNAIL DIR 
	ImageCopyResized($im_out, $im_in, 0, 0, 0, 0, $new_width, $new_height, $size[0], $size[1]); 		$im=$corePath."/".$uploadPath."/thumbs/".$newfile_name;
	imagejpeg($im_out,$im);
	ImageDestroy($im_in); 
	ImageDestroy($im_out); 

Thanks in advance!

[devinemke]

<?
$path_parts = pathinfo ($im);
$filename = basename ($im , '.jpg');
if (rename ($im, $path_parts['dirname'] . '/' . $filename . '_thumb.' . $path_parts['extension'])) {echo 'rename successful!';}
else {echo 'rename failed!';}
?>