<?php
$file_name = "config.php";
$file_handle = fopen($file_name, 'w') or die("Can't open file");
$text = '$DBHOST = "'.$_POST['DBHOST']'";';
$text .= '$DBUSER = "'.$_POST['DBUSER']'";';
$text .= '$DBPASS = "'.$_POST['DBPASS']'";';
$text .= 'mysql_connect($DBHOST,$DBUSER,$DBPASS);';
fwrite($file_handle, $text);
fclose($file_handle);
?>