How to rename file for each download request

[fogsys]

ok here is what Im trying to create:
simple code that renames the file to be downloaded each time someone downloads it.
example:
you download my file, it will be rename to smth different that way you cant access the file using that URL anymore

here is the code:
for some reasons the renaming part doesnt work.
any input would be greatly appreciated
as122223333443. txt = the new generated name is updated to this file that way the next person to download gets the right link.

<?php
function renom($file1, $file2)
{
	rename($file1, $file2);
	}
function updateit()
{
	$random_digit=rand(0000,9999);
	$random_link = $random_digit.".zip";
	$myFile = "as122223333443.txt";
$fh = fopen($myFile, 'w') or die("can't open file");
$stringData = $random_link;
fwrite($fh, $stringData);
fclose($fh);
$file1 = $thelink;
$file2 = $random_link;
renom($file1,$file2);
	}
function downloada()
{
	$dlink = "as122223333443.txt";
$fh = fopen($dlink, 'r');
$thelink= fread($fh, 25);
fclose($fh);

echo "http://www.site.com/".$thelink;
	updateit();
	}

[JKing]

ok here is what Im trying to create:
simple code that renames the file to be downloaded each time someone downloads it.
example:
you download my file, it will be rename to smth different that way you cant access the file using that URL anymore

here is the code:
for some reasons the renaming part doesnt work.
any input would be greatly appreciated
as122223333443. txt = the new generated name is updated to this file that way the next person to download gets the right link.

<?php
function renom($file1, $file2)
{
	rename($file1, $file2);
	}
function updateit()
{
	$random_digit=rand(0000,9999);
	$random_link = $random_digit.".zip";
	$myFile = "as122223333443.txt";
$fh = fopen($myFile, 'w') or die("can't open file");
$stringData = $random_link;
fwrite($fh, $stringData);
fclose($fh);
$file1 = $thelink;
$file2 = $random_link;
renom($file1,$file2);
	}
function downloada()
{
	$dlink = "as122223333443.txt";
$fh = fopen($dlink, 'r');
$thelink= fread($fh, 25);
fclose($fh);

echo "http://www.site.com/".$thelink;
	updateit();
	}

Your variable $thelink is invisible to your function updateit. I suggest passing your $thelink variable to your updateit function.