.htaccess将查询字符串参数加倍

Question

I am trying to redirect all requests except images, css, javascript to my index.php from root directory, so user can not access other files like .php directly.

I have following rules in my .htaccess file in my website's root directory :

RewriteEngine On

RewriteBase /

RewriteCond %{REQUEST_URI} !\.(css|js|png|jpe?g|gif|bmp|txt)$

RewriteRule ^(.*)$ index.php?url=$1 [NC,L,QSA]

In index.php I wrote print_r($_SERVER) and when I access for example /test under [QUERY_STRING] it shows something I don't understand :

array(
..
[QUERY_STRING] => url=index.php&url=test
..
)

My questions are : Why is this happening? and Does this affect website performance?

Note : If I add RewriteCond %{REQUEST_FILENAME} !-f it shows only url=test, but this allows direct access to files, so a removed this condition.

Answer 1

As Cheery points out in the comments, Apache is performing multiple rewrites. You should add index.php to the list of things the rewrite engine should leave alone:

RewriteCond %{REQUEST_URI} !index\.php$