file upload/file extention help

[mdojet]

On my site the user will upload a video or audio. Earlier you guys helped me with a small script to extract the file extention. I also have the script to do the uploading of the file but I am not sure how to incorporate the file extention script in the upload script. I will include my 2 scripts.

UPLOAD SCRIPT
(the extention. wmv below will be replaced with a variable holding the proper extention)

$vid_file = $session[USERNAME].$id.".wmv";
$numoffile = 1;

$file_dir = " /var/www/html/comedy/comicvids/";

if ($POST) {

for ($i=0;$i<$numoffile;$i++) {

if (trim($FILES['myfiles']['name'][$i])!="") {

$newfile = $file_dir.$FILES['myfiles']['name'][$i];
$newfile = "/var/www/html/comedy/comicvids/$vid_file";
move_uploaded_file($FILES['myfiles']['tmp_name'][$i], $newfile);

$j++;

FIND THE FILE EXTENTION SCRIPT

$path_parts = pathinfo('/www/htdocs/index.mpg');

echo $path_parts['extension'], "\n";

I dont want to print the extention, just put it in a variable then fit it in to the above upload script.

I am fairly new at PHP and sometimes this stuff I need to do is over my head and I appreciate all your help!!

[daphreeek]

This function will return the file extension:

function getFileExtension($str) {

$i = strrpos($str,".");
if (!$i) { return ""; }

$l = strlen($str) - $i;
$ext = substr($str,$i+1,$l);

return $ext;

}

I use this at the top of my upload scripts to allow only file types I want:

$ext = getFileExtension($imgfile_name);
$ext = strtolower($pext);

if (($ext != "wmv")  && ($ext != "mpeg") && ($ext != "mp3") {
    echo "Invalid file type";
    exit;
}