解決Use 'LimitInternalRecursion' to increase the limit if necessary的問題 CodeIgniter .htaccess

配置.htaccess以下：

RewriteEngine on
RewriteBase /
RewriteCond $1 !^(index\.php|images|robots\.txt|css|js); 
RewriteRule ^(.*)$ /sis/index.php/$1 [L]

Apache（error.log）報錯以下：

12220:tid 1848] [client ::1:50815] AH00124: Request exceeded the limit of 10 internal redirects due to probable configuration error. Use 'LimitInternalRecursion' to increase the limit if necessary. Use 'LogLevel debug' to get a backtrace.
[Thu Sep 10 14:24:14.491172 2015] [core:debug] [pid 12220:tid 1848] core.c(3590): [client ::1:50815] AH00121: r->uri = /sis/index.php/sis/index.php/sis/index.php/sis/index.php/sis/index.php/sis/index.php/sis/index.php/sis/index.php/sis/index.php/sis/index.php/sis/index.php/news/create
[Thu Sep 10 14:24:14.491172 2015] [core:debug] [pid 12220:tid 1848] core.c(3596): [client ::1:50815] AH00122: redirected from r->uri = /sis/index.php/sis/index.php/sis/index.php/sis/index.php/sis/index.php/sis/index.php/sis/index.php/sis/index.php/sis/index.php/sis/index.php/news/create
[Thu Sep 10 14:24:14.491172 2015] [core:debug] [pid 12220:tid 1848] core.c(3596): [client ::1:50815] AH00122: redirected from r->uri = /sis/index.php/sis/index.php/sis/index.php/sis/index.php/sis/index.php/sis/index.php/sis/index.php/sis/index.php/sis/index.php/news/create
[Thu Sep 10 14:24:14.491172 2015] [core:debug] [pid 12220:tid 1848] core.c(3596): [client ::1:50815] AH00122: redirected from r->uri = /sis/index.php/sis/index.php/sis/index.php/sis/index.php/sis/index.php/sis/index.php/sis/index.php/sis/index.php/news/create
[Thu Sep 10 14:24:14.491172 2015] [core:debug] [pid 12220:tid 1848] core.c(3596): [client ::1:50815] AH00122: redirected from r->uri = /sis/index.php/sis/index.php/sis/index.php/sis/index.php/sis/index.php/sis/index.php/sis/index.php/news/create
[Thu Sep 10 14:24:14.491172 2015] [core:debug] [pid 12220:tid 1848] core.c(3596): [client ::1:50815] AH00122: redirected from r->uri = /sis/index.php/sis/index.php/sis/index.php/sis/index.php/sis/index.php/sis/index.php/news/create
[Thu Sep 10 14:24:14.491172 2015] [core:debug] [pid 12220:tid 1848] core.c(3596): [client ::1:50815] AH00122: redirected from r->uri = /sis/index.php/sis/index.php/sis/index.php/sis/index.php/sis/index.php/news/create
[Thu Sep 10 14:24:14.491172 2015] [core:debug] [pid 12220:tid 1848] core.c(3596): [client ::1:50815] AH00122: redirected from r->uri = /sis/index.php/sis/index.php/sis/index.php/sis/index.php/news/create
[Thu Sep 10 14:24:14.491172 2015] [core:debug] [pid 12220:tid 1848] core.c(3596): [client ::1:50815] AH00122: redirected from r->uri = /sis/index.php/sis/index.php/sis/index.php/news/create
[Thu Sep 10 14:24:14.491172 2015] [core:debug] [pid 12220:tid 1848] core.c(3596): [client ::1:50815] AH00122: redirected from r->uri = /sis/index.php/sis/index.php/news/create
[Thu Sep 10 14:24:14.491172 2015] [core:debug] [pid 12220:tid 1848] core.c(3596): [client ::1:50815] AH00122: redirected from r->uri = /sis/index.php/news/create

蒐集到的有用的參考資料：http://www.askapache.com/htaccess/modrewrite-tips-tricks.html

Loop Stopping Code ^

Sometimes your rewrites cause infinite loops, stop it with one of these rewrite code snippets.

RewriteCond %{REQUEST_URI} ^/(stats/|missing\.html|failed_auth\.html|error/).* [NC]
RewriteRule .* - [L]

RewriteCond %{ENV:REDIRECT_STATUS} 200
RewriteRule .* - [L]

修改後的.htaccess

RewriteEngine on
RewriteBase /
RewriteCond %{ENV:REDIRECT_STATUS} 200
RewriteRule .* - [L]
RewriteCond $1 !^(index\.php|images|robots\.txt|css|js); 
RewriteRule ^(.*)$ /sis/index.php/$1 [L]

問題解決：瀏覽器地址欄中輸入http://localhost/sis/news（不用輸入index.php），頁面打開正常。