you can use http rewrite rules, or you could use javascript, but the latter might not be as feasible because if they have js disabled on the pda, it won't catch. http rewrite happens on your server based on their user agent, though, so that would be much more reliable...


ex

RewriteCond %{HTTP_USER_AGENT} “Windows CE” [NC,OR] #Windows CE and Pocket PC
RewriteCond %{HTTP_USER_AGENT} “NetFront” [NC,OR] #PalmSource WebBrowser 2.0
RewriteCond %{HTTP_USER_AGENT} “Palm OS” [NC,OR] #Eudora Web Browser for Palm
RewriteCond %{HTTP_USER_AGENT} “Blazer” [NC,OR] #Handspring Blazer Browser
RewriteCond %{HTTP_USER_AGENT} “Elaine” [NC,OR] #RIM Devices
RewriteCond %{HTTP_USER_AGENT} “^WAP.*$” [NC,OR] #WAP Browsers
RewriteCond %{HTTP_USER_AGENT} “Plucker” [NC,OR] #Plucker Offline download client
RewriteCond %{HTTP_USER_AGENT} “AvantGo” [NC] #AvantGo Service
RewriteRule ^index.php http://www.yourdomain.net/pda.php [L,R]


another way ( iphone example )

# Catch iPhone-users first, easiest to discover
RewriteCond %{HTTP_USER_AGENT} .*Mobile.*Safari
RewriteRule ^[\./](.*)$ http://beta.mydomain.no/iphone [L]

# Catch most familiar web browsers and redirect to web version,
# except Opera Mini and SymbianOS (which identifies itself as Safari)
RewriteCond %{HTTP_USER_AGENT} ((.*MSIE.*Windows\ NT.*)| \
(Lynx.*)|(.*Safari.*)|(.*Opera.*)|(.*Firefox.*)|(. *Konqueror.*))
RewriteCond %{HTTP_USER_AGENT} !(.*Opera\ Mini.*)
RewriteCond %{HTTP_USER_AGENT} !(.*SymbianOS.*)
RewriteRule ^[\./](.*)$ http://beta.mydomain.no/web [L]

# Browsers that match neither block, such as regular screen
# browsers, could be caught by a final rewrite rule placed here,
# or we could leave it out and have nothing happen to the
# requested URL. This is the default.

RewriteRule ^[\./](.*)$ http://beta.mydomain.no/mobile [L]