问题描述
我在这里的文章被来自世界各地提交，我记录下来的位置，如国家网站 - ＆GT;状态 - ＆GT;城市，对于像我正在生成URL：
I have a site where articles being submitted from worldwide and I record the location of them as Country -> State -> City, for that I am generating URLs like:
site/location/countryname/statename/cityname
我可以采取要求来照顾，并在查询字符串值，得到一个单一的PHP文件，现在的问题是怎么写的mod_rewrite所以它可以有URL像上面？
I have a single php file which can take care of coming request and gets values in query string, now the problem is how to write mod_rewrite so it can have URL like above?
PS：如果有人删除或Statename的这COUNTRYNAME不应该传递空值，意味着URL可以是：
PS: It should not pass empty values if someone deletes the statename or countryname, means URL can be:
site/location/countryname
site/location/countryname/statename
site/location/countryname/statename/cityname
但不能是：
site/location//statename/cityname
site/location/countryname//cityname
在上面的网址，如果COUNTRYNAME被删除，那么Statename的不应该被视为COUNTRYNAME。读文件名为 location.php
In above urls if countryname is deleted then statename shouldnt be treated as countryname. Reading file name is location.php
谢谢，
推荐答案
好吧我有一个办法做到这一点：
Ok I have got a way to do that:
RewriteRule ^bylocation/([-a-z_]+)(?:/([-a-z_]+)(?:/([-a-z_]+))?)?/?$ location.php?country=$1&state=$2&city=$3 [NC,L,QSA]
这单一规则可以照顾，而不是三个规则。
This single rule can take care, instead of three rules.
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