[PHP] script to check if form is submitted from the same page?

[Afan Pasalic]

could I use this code to check if form is submitted from the same 
page/same domain

if ($_POST['form_submitted'] == 'Yes')
{
   if (preg_match($_SERVER['HTTP_HOST'], $_SERVER["HTTP_REFERER"]) == 0)
   {
       die ('^&[EMAIL PROTECTED]');
   }
}
thanks

-afan

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