How to set up a warning page that appears once on whatever page you enter a site?

[Darrell]

Anybody know how to set up a warning page that appears once on whatever page you enter a site and preferably in the language of the surfer? youporn does this and I cannot find out how to do that anywhere

Thanks for any help.

[quantum-x]

<? if (!isset($_COOKIE['splash'])) { 
    setcookie('splash','1',time()+90*86400); ?>
    <div id="splash">Warning</div>
<? } ?>

That'll do the trick.
Essentially, you check for a cookie. If there's no cookie, then you set one, and then display the div / whatever you want.

[Darrell]

Wow thanks I'll try that out

Just doing some searches for youporn on google and they are not ranking well although I'm sure they used to rank very well for 'free porn' etc. Maybe their warning page is affecting their rankings.