Reindirizzare i browser obsoleti con il file .htaccess

I browser obsoleti sono certamente un grande problema quando si sviluppano siti web. In questo articolo vorrei presentare una soluzione che fa uso delle regole del file .htaccess per reindirizzare questi browser ad una pagina del sito in cui viene consigliato un aggiornamento.

Aggiungete il seguente codice al vostro file .htaccess:

RewriteCond %{REQUEST_FILENAME} !^.png [nc]
RewriteCond %{REQUEST_FILENAME} !^.css [nc]
RewriteCond %{REQUEST_FILENAME} !^.jpg [nc]
RewriteCond %{REQUEST_FILENAME} !^.js [nc]
RewriteCond %{REQUEST_FILENAME} !^.gif [nc]
RewriteCond %{HTTP_USER_AGENT} "Firefox/2" [or]
RewriteCond %{HTTP_USER_AGENT} "Firefox/1" [or]
RewriteCond %{HTTP_USER_AGENT} "Flock/1" [or]
RewriteCond %{HTTP_USER_AGENT} "Camino/1" [or]
RewriteCond %{HTTP_USER_AGENT} "Opera/9" [or]
RewriteCond %{HTTP_USER_AGENT} "Opera/8" [or]
RewriteCond %{HTTP_USER_AGENT} "Opera/7" [or]
RewriteCond %{HTTP_USER_AGENT} "Opera/6" [or]
RewriteCond %{HTTP_USER_AGENT} "Opera/5" [or]
RewriteCond %{HTTP_USER_AGENT} "Opera/4" [or]
RewriteCond %{HTTP_USER_AGENT} "Opera/3" [or]
RewriteCond %{HTTP_USER_AGENT} "Opera/2" [or]
RewriteCond %{HTTP_USER_AGENT} "Opera/1" [or]
RewriteCond %{HTTP_USER_AGENT} "Safari/4" [or]
RewriteCond %{HTTP_USER_AGENT} "Safari/3" [or]
RewriteCond %{HTTP_USER_AGENT} "Safari/2" [or]
RewriteCond %{HTTP_USER_AGENT} "Safari/1" [or]
RewriteCond %{HTTP_USER_AGENT} "Navigator/" [or]
RewriteCond %{HTTP_USER_AGENT} "MSIE 7" [or]
RewriteCond %{HTTP_USER_AGENT} "MSIE 6" [or]
RewriteCond %{HTTP_USER_AGENT} "MSIE 5" [or]
RewriteCond %{HTTP_USER_AGENT} "MSIE 4" [or]
RewriteCond %{HTTP_USER_AGENT} "MSIE 3" [or]
RewriteCond %{HTTP_USER_AGENT} "MSIE 2" [or]
RewriteCond %{HTTP_USER_AGENT} "MSIE 1"
RewriteRule . upgrade.html [L]