identify HTML page using PHP -

is there way identify different html pages using php, example want know page data submitted can make logic using php,

if had example.html & example2.html pages both submitting logic.php, if data comes example.html

$data = array();  $data['template'] $_post['example']; $data['template'] $_post['example2']; 

so logic

if(logic){      $data['template'] $_post['example']; }else{      $data['template'] $_post['example2']; } 

but not sure how identyfie particular pages

either include hidden field form

<input type="hidden" name="hiddenfield" value="example1"> 

and

if($_post['hiddenfield']=="example1") { } else { }     

or use referer

if(substr_count($_server['http_referer'],"example.htm")) { } else } 

http://www.php.net/manual/en/reserved.variables.server.php

'http_referer' address of page (if any) referred user agent current page. set user agent. not user agents set this, , provide ability modify http_referer feature. in short, cannot trusted.

both have pros , cons, , both can of course faked user...