这已经被问了一千次了，但并不完全是我想要的。我尝试组合不同的解决方案，但我的 .htaccess 似乎没有做它应该做的事情。
# Not sure what this does?
Options +FollowSymLinks -MultiViews
# Turn mod_rewrite on
RewriteEngine On
# To externally redirect /dir/foo.php to /dir/foo
RewriteCond %{THE_REQUEST} ^[A-Z]{3,}'s([^.]+)'.php [NC]
RewriteRule ^ %1 [R,L]
# To internally forward /dir/foo to /dir/foo.php
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME}.php -f
RewriteRule ^(.*?)/?$ $1.php [L]
# Redirect index in any directory to root of that directory
RewriteCond %{THE_REQUEST} ^[A-Z](3,9)' /([^/]+/)*index'.[^' ]*' HTTP/
RewriteRule ^(([^/]+/)*)index('.[a-z0-9]+)?$ http://www.example.com/$1? [R=301,L]
现在我的页面正确地从domain.com/page1.php更改为domain.com/page1，但是domain.com/index.php出了点问题。
我正在本地测试它，当要localhost/project一切正常时(index.php打开，但您在 url 中看不到(，但是当您显式导航到localhost/project/index.php时，您将返回到根目录，即 localhost(母鸡回到http://localhost/xampp/splash.php(。当然，这不是我想要的。我希望localhost/project/index.php返回到"本地主机/项目/"。
不过，还有一个问题：重写规则如何影响搜索引擎。页面(即联系人.php、关于我们.php等(是否仍会被编入索引？
额外的+1和对他或她的赞誉，他或她在答案中详细细分了htaccess中的每一行/规则的作用。我还在学习.htaccess，所以每个细节都很重要，与我相关！
有问题的这段代码中的很多注释似乎是我:)
无论如何，您可以使用此代码来解决您的问题：
# Turn mod_rewrite on
RewriteEngine On
RewriteBase /project/
# To externally redirect /dir/foo.php to /dir/foo
RewriteCond %{THE_REQUEST} 's/+project/+(.*?/)?(?:index)?(.*?)'.php['s?] [NC]
RewriteRule ^ %1%2 [R=302,L,NE]
# To internally forward /dir/foo to /dir/foo.php
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{DOCUMENT_ROOT}/project/$1'.php -f [NC]
RewriteRule ^(.+?)/?$ $1.php [L]
更新：用于DocumentRoot：
# Turn mod_rewrite on
RewriteEngine On
RewriteBase /
# To externally redirect /dir/foo.php to /dir/foo
RewriteCond %{THE_REQUEST} 's/+(.*?/)?(?:index)?(.*?)'.php['s?] [NC]
RewriteRule ^ %1%2 [R=302,L,NE]
# To internally forward /dir/foo to /dir/foo.php
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{DOCUMENT_ROOT}/$1'.php -f [NC]
RewriteRule ^(.+?)/?$ $1.php [L]