form submission

[Anon]

i have a form on an html page which submits to a php page.

form.html page has....
<form action="form_action.php">
</form>

form_action.php then processes the form submission.

How can i prevent anyone from setting up the same form on another server and submitting to my php page form_action.php, like this
<form action="http://myserver/form_action.php">
</form>

please help.....

[van__]

$GLOBALS['HTTP_REFERER']

..or for the 4.1.x freaks 😉 ...
$_SERVER['HTTP_REFERER']

just use it like so...
<?
$URL = parse_url($_SERVER['HTTP_REFERER']);
if (!preg_match('/domain.com/i',$URL['host'])) {
//throw them to a page for naughty peeps.
header("LOCATION: domain.com/somepage.php");
exit;
}
?>

[kevinsequeira]

thanks for your help Van. It worked