Renaming files with number series.

[ted_chou12]

[code]
<?php
$dataf = "1.txt";
$file = fopen("$dataf","w");
$write = fwrite($file,"not important text");
fclose($file);
?>
[/code]

What code do I insert in if i want to rename the $dataf text file in numbers, eg. 1,2,3... in sequence, each time creating a new file with a interger above the last one?

[mithu_sree]

http://www.php.net/rename
http://www.phpfreaks.com/phpref/157.php