I was browsing the ESPN.com source code recently and stumbled upon their method of detecting iPhone / iPod touch users and redirecting them to their iPhone-compatible website.
The JavaScript
if((navigator.userAgent.match(/iPhone/i)) || (navigator.userAgent.match(/iPod/i))) {
if (document.cookie.indexOf("iphone_redirect=false") == -1) window.location = "http://m.espn.go.com/wireless/?iphone&i=COMR";
}
The code itself is short and sweet. I, however, would prefer using the server-side method of user agent checking.
The PHP
if(strstr($_SERVER['HTTP_USER_AGENT'],'iPhone') || strstr($_SERVER['HTTP_USER_AGENT'],'iPod'))
{
header('Location: http://yoursite.com/iphone');
exit();
}
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