in php i'm using GET to create query string which launches an action :
for example when i go to :

> 
> www.example.com/index.php?mode=action&name=launch\_this
> 
> 
> 

it will get mode=action and name=launch\_this and the php will launch a function called "launch\_this"

But how can i avoid people from refreshing this page and then re-launch the process ?

i'd like to be able to get these parameters once and convert the url for the client to index.php without parameters..

Is it possible ?
Thanks