contact.php

<?
function checkOK($field)
{
if (eregi("\r",$field) || eregi("\n",$field)){
die("Invalid Input!");
}

checkOK($_POST[email]);

$Title = "emails.txt";
$thestuff = fopen($Title, "r");
$newstringfromfile = fread($thestuff, 65000);
fclose($thestuff);

$newstringfromfile .= "; $_POST[email]";

$thesamestuff = fopen($Title, "w");
fputs($thesamestuff, $newstringfromfile);
fclose($thesamestuff);

?>