问题描述
我有一个需要做一些修改一个htaccess的。我的网站是能够在URL中显示多个类别，以便在不同类别的项目可以被显示给用户，在同一时间。实施例将像domain.com/fans.php?cat [] = 1＆安培;猫[] = 2及猫[] = 3
I have a htaccess that needs some modification. My site is able to show multiple category within a URL so that items in different category can be shown to user at the same time. Example would be like domain.com/fans.php?cat[]=1&cat[]=2&cat[]=3
为使这个网址的友好，我加入到我的htaccess一行1类，另一条线路为2类，另一个为3类等等。如下所示
To make this URL friendly, I add into my htaccess one line for 1 category, another line for 2 category and another for 3 category and more. As shown below
RewriteRule ^fans/category/([a-zA-Z0-9\-]+)$ fans.php?cat=$1
上面将成为domain.com/fans/category/1
RewriteRule ^fans/category/([a-zA-Z0-9\-]+)&([a-zA-Z0-9\-]+)$ fans.php?cat[]=$1&cat[]=$2
上面将成为domain.com/fans/category/1&2
RewriteRule ^fans/category/([a-zA-Z0-9\-]+)&([a-zA-Z0-9\-]+)&([a-zA-Z0-9\-]+)$ fans.php?cat[]=$1&cat[]=$2&cat[]=$3
上面将成为domain.com/fans/category/1&2&3
我的问题是，如果我需要显示4个类别，甚至10类是什么？有没有一种方法来简化htacesss重写规则，允许类n次结合？还是我必须要不断的重复就像我在做什么上面。
My question is, what if I need to show 4 category or even 10 category? Is there a way to simplify rewrite rules in htacesss that will allow n times of category combine? or do I have to keep repeating like what I am doing above.
推荐答案
有可能有一个规则，只要有足够多的可选的正则表达式组和空白键（猫[] = ）是没有问题的。示例3参数最大：
It is possible to have one rule as long as there are enough optional regex groups, and empty keys (cat[]=) are not a problem . Example for 3 parameters maximum:
请求： http://example.com/fans/category/1&2&3
Options +FollowSymlinks -MultiViews
RewriteEngine On
RewriteBase /
RewriteRule ^fans/category/([^&]+)&?([^&]+)?&?([^&]+)?$ /fans.php?cat1=$1&cat2=$2&cat3=$3 [L,NC]
不过，当有很多的参数，它的更好，更加灵活，通过完整的URI路径与参数传递给脚本，使用单一的重写规则。像这样的：
However, when there are many parameters, it's better and more versatile to pass the complete URI-path with parameters to the script, using a single rewrite rule. Like this:
RewriteRule ^fans/category/(.*) /fans.php?$1 [L,NC]
和获得脚本的参数与code类似于此：
And get the parameters in the script with a code similar to this one:
<?php
$Query = $_SERVER['QUERY_STRING'];
$Parameters = explode ('&', $Query);
echo "cat1 = ". $Parameters[0] . "<br />";
echo "cat2 = ". $Parameters[1] . "<br />";
echo "cat3 = ". $Parameters[2] . "<br />";
...
?>
有几种方法来达到同样的效果在PHP，也许有一个更好的，这仅仅是一个例子。
There are several ways to achieve the same result in php and maybe there is a better one, this is just an example.
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