我正忙於將生產 codeigniter 專案遷移到新伺服器。目前的設定已經運作良好近一年了，但在遷移到新的 LAMP 堆疊時，我遇到了一個奇怪的問題，即將 index.php 重寫回 URL。
我最初的想法是這個問題更適合 SO，但是兩個實例之間的程式碼完全相同，並且都運行 Debian 7.5 和 Apache 2.2.22，這讓我認為這是我不知道的伺服器配置差異的。
這是mod_rewrite如下
RewriteEngine On
RewriteBase /bookings/
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php/$1 [L]
就像我說的那樣，這在當前設定中運行良好，但是在新伺服器上，來自基本頁面的連結總是被重寫到同一頁面。
我為兩台伺服器都開啟了重寫日誌記錄，新伺服器正在執行一個我無法解釋的額外重寫步驟。
當前伺服器：
105.237.x.x - - [16/May/2014:09:45:11 +0200] [www.domain.tld/sid#7fd5c46fbfc8][rid#7fd5c45350a0/initial] (3) [perdir /var/www/vhosts/domain.tld/html/bookings/] add path info postfix: /var/www/vhosts/domain.tld/html/bookings/school -> /var/www/vhosts/domain.tld/html/bookings/school/event/1
105.237.x.x - - [16/May/2014:09:45:11 +0200] [www.domain.tld/sid#7fd5c46fbfc8][rid#7fd5c45350a0/initial] (3) [perdir /var/www/vhosts/domain.tld/html/bookings/] strip per-dir prefix: /var/www/vhosts/domain.tld/html/bookings/school/event/1 -> school/event/1
105.237.x.x - - [16/May/2014:09:45:11 +0200] [www.domain.tld/sid#7fd5c46fbfc8][rid#7fd5c45350a0/initial] (3) [perdir /var/www/vhosts/domain.tld/html/bookings/] applying pattern '^(.*)$' to uri 'school/event/1'
105.237.x.x - - [16/May/2014:09:45:11 +0200] [www.domain.tld/sid#7fd5c46fbfc8][rid#7fd5c45350a0/initial] (4) [perdir /var/www/vhosts/domain.tld/html/bookings/] RewriteCond: input='/var/www/vhosts/domain.tld/html/bookings/school' pattern='!-f' => matched
105.237.x.x - - [16/May/2014:09:45:11 +0200] [www.domain.tld/sid#7fd5c46fbfc8][rid#7fd5c45350a0/initial] (4) [perdir /var/www/vhosts/domain.tld/html/bookings/] RewriteCond: input='/var/www/vhosts/domain.tld/html/bookings/school' pattern='!-d' => matched
105.237.x.x - - [16/May/2014:09:45:11 +0200] [www.domain.tld/sid#7fd5c46fbfc8][rid#7fd5c45350a0/initial] (2) [perdir /var/www/vhosts/domain.tld/html/bookings/] rewrite 'school/event/1' -> 'index.php/school/event/1'
105.237.x.x - - [16/May/2014:09:45:11 +0200] [www.domain.tld/sid#7fd5c46fbfc8][rid#7fd5c45350a0/initial] (3) [perdir /var/www/vhosts/domain.tld/html/bookings/] add per-dir prefix: index.php/school/event/1 -> /var/www/vhosts/domain.tld/html/bookings/index.php/school/event/1
105.237.x.x - - [16/May/2014:09:45:11 +0200] [www.domain.tld/sid#7fd5c46fbfc8][rid#7fd5c45350a0/initial] (2) [perdir /var/www/vhosts/domain.tld/html/bookings/] trying to replace prefix /var/www/vhosts/domain.tld/html/bookings/ with /bookings/
105.237.x.x - - [16/May/2014:09:45:11 +0200] [www.domain.tld/sid#7fd5c46fbfc8][rid#7fd5c45350a0/initial] (5) strip matching prefix: /var/www/vhosts/domain.tld/html/bookings/index.php/school/event/1 -> index.php/school/event/1
105.237.x.x - - [16/May/2014:09:45:11 +0200] [www.domain.tld/sid#7fd5c46fbfc8][rid#7fd5c45350a0/initial] (4) add subst prefix: index.php/school/event/1 -> /bookings/index.php/school/event/1
105.237.x.x - - [16/May/2014:09:45:11 +0200] [www.domain.tld/sid#7fd5c46fbfc8][rid#7fd5c45350a0/initial] (1) [perdir /var/www/vhosts/domain.tld/html/bookings/] internal redirect with /bookings/index.php/school/event/1 [INTERNAL REDIRECT]
105.237.x.x - - [16/May/2014:09:45:11 +0200] [www.domain.tld/sid#7fd5c46fbfc8][rid#7fd5b3e057c8/initial/redir#1] (3) [perdir /var/www/vhosts/domain.tld/html/bookings/] add path info postfix: /var/www/vhosts/domain.tld/html/bookings/index.php -> /var/www/vhosts/domain.tld/html/bookings/index.php/school/event/1
105.237.x.x - - [16/May/2014:09:45:11 +0200] [www.domain.tld/sid#7fd5c46fbfc8][rid#7fd5b3e057c8/initial/redir#1] (3) [perdir /var/www/vhosts/domain.tld/html/bookings/] strip per-dir prefix: /var/www/vhosts/domain.tld/html/bookings/index.php/school/event/1 -> index.php/school/event/1
105.237.x.x - - [16/May/2014:09:45:11 +0200] [www.domain.tld/sid#7fd5c46fbfc8][rid#7fd5b3e057c8/initial/redir#1] (3) [perdir /var/www/vhosts/domain.tld/html/bookings/] applying pattern '^(.*)$' to uri 'index.php/school/event/1'
105.237.x.x - - [16/May/2014:09:45:11 +0200] [www.domain.tld/sid#7fd5c46fbfc8][rid#7fd5b3e057c8/initial/redir#1] (4) [perdir /var/www/vhosts/domain.tld/html/bookings/] RewriteCond: input='/var/www/vhosts/domain.tld/html/bookings/index.php' pattern='!-f' => not-matched
105.237.x.x - - [16/May/2014:09:45:11 +0200] [www.domain.tld/sid#7fd5c46fbfc8][rid#7fd5b3e057c8/initial/redir#1] (1) [perdir /var/www/vhosts/domain.tld/html/bookings/] pass through /var/www/vhosts/domain.tld/html/bookings/index.php
新伺服器：
### First section is identical ###
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f33673240a0/initial] (3) [perdir /var/www/vhosts/domain.tld/html/bookings/] add path info postfix: /var/www/vhosts/domain.tld/html/bookings/school -> /var/www/vhosts/domain.tld/html/bookings/school/event/1
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f33673240a0/initial] (3) [perdir /var/www/vhosts/domain.tld/html/bookings/] strip per-dir prefix: /var/www/vhosts/domain.tld/html/bookings/school/event/1 -> school/event/1
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f33673240a0/initial] (3) [perdir /var/www/vhosts/domain.tld/html/bookings/] applying pattern '^(.*)$' to uri 'school/event/1'
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f33673240a0/initial] (4) [perdir /var/www/vhosts/domain.tld/html/bookings/] RewriteCond: input='/var/www/vhosts/domain.tld/html/bookings/school' pattern='!-f' => matched
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f33673240a0/initial] (4) [perdir /var/www/vhosts/domain.tld/html/bookings/] RewriteCond: input='/var/www/vhosts/domain.tld/html/bookings/school' pattern='!-d' => matched
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f33673240a0/initial] (2) [perdir /var/www/vhosts/domain.tld/html/bookings/] rewrite 'school/event/1' -> 'index.php/school/event/1'
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f33673240a0/initial] (3) [perdir /var/www/vhosts/domain.tld/html/bookings/] add per-dir prefix: index.php/school/event/1 -> /var/www/vhosts/domain.tld/html/bookings/index.php/school/event/1
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f33673240a0/initial] (2) [perdir /var/www/vhosts/domain.tld/html/bookings/] trying to replace prefix /var/www/vhosts/domain.tld/html/bookings/ with /bookings/
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f33673240a0/initial] (5) strip matching prefix: /var/www/vhosts/domain.tld/html/bookings/index.php/school/event/1 -> index.php/school/event/1
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f33673240a0/initial] (4) add subst prefix: index.php/school/event/1 -> /bookings/index.php/school/event/1
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f33673240a0/initial] (1) [perdir /var/www/vhosts/domain.tld/html/bookings/] internal redirect with /bookings/index.php/school/event/1 [INTERNAL REDIRECT]
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f3367321b58/initial/redir#1] (3) [perdir /var/www/vhosts/domain.tld/html/bookings/] add path info postfix: /var/www/vhosts/domain.tld/html/bookings/index.php -> /var/www/vhosts/domain.tld/html/bookings/index.php/school/event/1
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f3367321b58/initial/redir#1] (3) [perdir /var/www/vhosts/domain.tld/html/bookings/] strip per-dir prefix: /var/www/vhosts/domain.tld/html/bookings/index.php/school/event/1 -> index.php/school/event/1
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f3367321b58/initial/redir#1] (3) [perdir /var/www/vhosts/domain.tld/html/bookings/] applying pattern '^(.*)$' to uri 'index.php/school/event/1'
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f3367321b58/initial/redir#1] (4) [perdir /var/www/vhosts/domain.tld/html/bookings/] RewriteCond: input='/var/www/vhosts/domain.tld/html/bookings/index.php' pattern='!-f' => not-matched
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f3367321b58/initial/redir#1] (1) [perdir /var/www/vhosts/domain.tld/html/bookings/] pass through /var/www/vhosts/domain.tld/html/bookings/index.php
### The extra redirect ###
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f33673220a0/initial] (3) [perdir /var/www/vhosts/domain.tld/html/bookings/] strip per-dir prefix: /var/www/vhosts/domain.tld/html/bookings/ ->
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f33673220a0/initial] (3) [perdir /var/www/vhosts/domain.tld/html/bookings/] applying pattern '^(.*)$' to uri ''
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f33673220a0/initial] (4) [perdir /var/www/vhosts/domain.tld/html/bookings/] RewriteCond: input='/var/www/vhosts/domain.tld/html/bookings/' pattern='!-f' => matched
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f33673220a0/initial] (4) [perdir /var/www/vhosts/domain.tld/html/bookings/] RewriteCond: input='/var/www/vhosts/domain.tld/html/bookings/' pattern='!-d' => not-matched
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f33673220a0/initial] (1) [perdir /var/www/vhosts/domain.tld/html/bookings/] pass through /var/www/vhosts/domain.tld/html/bookings/
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f336731c0a0/subreq] (3) [perdir /var/www/vhosts/domain.tld/html/bookings/] strip per-dir prefix: /var/www/vhosts/domain.tld/html/bookings/index.php -> index.php
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f336731c0a0/subreq] (3) [perdir /var/www/vhosts/domain.tld/html/bookings/] applying pattern '^(.*)$' to uri 'index.php'
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f336731c0a0/subreq] (4) [perdir /var/www/vhosts/domain.tld/html/bookings/] RewriteCond: input='/var/www/vhosts/domain.tld/html/bookings/index.php' pattern='!-f' => not-matched
105.237.x.x - - [16/May/2014:10:11:18 +0200] [www.domain.tld/sid#7f33674c04f0][rid#7f336731c0a0/subreq] (1) [perdir /var/www/vhosts/domain.tld/html/bookings/] pass through /var/www/vhosts/domain.tld/html/bookings/index.php
從上面可以看出，新伺服器正確執行了初始重定向，但有一個額外的部分始終回傳index.php。知道是什麼原因造成的嗎？我甚至無法 100% 確定他們的問題出在 mod_rewrite 上。我已經沒有選擇了，而且我對 mod_rewrite 不太了解
答案1
我不知道是什麼原因造成的，但我重新映像了伺服器，重新安裝了服務，問題就消失了。