To delete a file using php is very simple. First you need to know what the name of the file is that you are deleting which is what I set the ourFileName variable to. Then you simply use the unlink function and the file will be deleted. If the file is not in the current directory - then you would include the directory path to the file name. For example ourFileName = "mynewdocuments/newpage.txt".
<?
$ourFileName = "newpage.txt";
unlink($ourFileName);
?>