submit form on same page with get url

[mraza]

hi i hv a form to submit on this url

 

http://localhost/site/index.php?action=search

 

and in my html

 

<form method="GET" action="<?php echo $_SERVER['PHP_SELF'];?>" name="searchForm">// my code</form>// i also tried //http://localhost/site/index.php?action=search&// but did not helped

 

 

now problem is i wants to go that URL so after submit it should look a like this as i am loading search page with action.

http://localhost/site/index.php?action=search&searchstring=word

 

but it keeps me redirecting to

http://localhost/site/index.php?searchstring=word

 

how can i make it work so it will goto this URL

http://localhost/site/index.php?action=search&searchstring=word

 

Thanks for help.

[mraza]

solved

<input type="hidden" name="action" value="search" />