Limit file size and extensions on upload

I've created a simple upload form which renames the file to some random numbers but I keep encountering problems when adding file size/extension limits. This is the current code:

function findexts ($filename)
{
	$filename = strtolower($filename) ;
	$exts = split("[/\\.]", $filename) ;
	$n = count($exts)-1;
	$exts = $exts[$n];
	return $exts;
}
$ext = findexts ($_FILES['uploaded']['name']) ; 
    $ran = rand () ;
    $ran2 = $ran.".";
    $target = "upload/";
    $target = $target . $ran2.$ext; 
if(move_uploaded_file($_FILES['uploaded']['tmp_name'], $target))
{
echo "http://###.###.com/###/dl.php?file=".$ran2.$ext; //removed URL
}
else
{
echo "Sorry, there was a problem uploading your file.";
}

Code (markup):

Could anyone possibly help to add the above requirements in?

Cheers in advance.

 

$allowed_ext = array('doc','txt','rtf');
$ext = end(explode('.',$_FILES['uploaded']['name']);
$ran2 = rand().".";
$target = "upload/";
$target = $target . $ran2.$ext; 
if($_FILES['uploaded']['size'] > 1048576){ $message = 'File over 1048576 bytes';}
if($message == NULL && !in_array($ext,$allowed_ext)){ $message = 'File extension not allowed';}
if($message == NULL){
if(move_uploaded_file($_FILES['uploaded']['tmp_name'], $target))
{
$message =  "http://###.###.com/###/dl.php?file=".$ran2.$ext; //removed URL
}
else
{
$message = "Sorry, there was a problem uploading your file.";
}
}

echo $message;

PHP:

Peace,

 

Parse error: syntax error, unexpected ';' in inc.php on line 24

Line 24 is

$ext = end(explode('.',$_FILES['uploaded']['name']);

PHP:

 

There is a missing ")" Change it to:

$ext = end(explode('.',$_FILES['uploaded']['name']));

Code (markup):

Peace,