还是niginx/premalinks/super cache问题

前篇WordPress/Nginx打开permalinks并安装Super Cache插件介绍了用if和rewrite实现wordpress的permalinks和super cache，但是，根据Nginx文档IfIsEvil的介绍，if语句由于实现的历史原因，在location上下文中工作并不正常。所以这里把if...set...放到location外的server上下文中，然后再用try_files标记代替原来的rewrite。

#首先还是WP/super cache配置文件wp-super-cache
set $cache_uri $request_uri;

# POST requests and urls with a query string should always go to PHP
if ($request_method = POST) {
        set $cache_uri 'null cache';
}

if ($query_string != "") {
        set $cache_uri 'null cache';
}

# Don't cache uris containing the following segments
if ($request_uri ~* "(/wp-admin/|/xmlrpc.php|/wp-(app|cron|login|register|mail).php|wp-.*.php|/feed/|index.php|wp-comments-popup.php|wp-links-opml.php|wp-locations.php|sitemap(_index)?.xml|[a-z0-9_-]+-sitemap([0-9]+)?.xml)") {
        set $cache_uri 'null cache';
}

# Don't use the cache for logged in users or recent commenters
if ($http_cookie ~* "comment_author|wordpress_[a-f0-9]+|wp-postpass|wordpress_logged_in") {
        set $cache_uri 'null cache';
}

location /blog {
        index  index.html index.htm index.php;
        try_files /blog/wp-content/cache/supercache/$http_host/$cache_uri/index.html $uri $uri/ /blog/index.php?$args ;
}

这里假设WP安装在/blog目录下。其次是网站配置文件，包含wp-super-cache到server上下文中，需要注意的是WP对应的location已经放到wp-super-cache中了，所以网站配置文件中不再需要。如果WP不是虚拟目录的话，建议将root标记也放到server上下文中，这样php只需要配置一次.网站配置文件完整的server块如下：

        listen   443;
        server_name  localhost.localdomain;

        root /var/www;
        include wp-permalinks-super-cache;

        location ~ \.php$ {
                fastcgi_pass   127.0.0.1:9000;
                fastcgi_index  index.php;
                fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
                include fastcgi_params;
        }

多网站/目录共享WP配置方法可以参考文档：http://codex.wordpress.org/Nginx