关于nginx配置中的多个if的匹配规则

location ~ /bb { if ( $ args ~ "_kw=[\w]+" ) { access_log logs/kw ; access_log logs/all ; } if ( $ args ~ "(_pg=[\w]+|_pc=[\w]+)" ) { access_log logs/pg ; access_log logs/all ; } if ( $ args ~ "_kw=[\w]+.*(_pg=[\w]+|_pc=[\w]+)" ) { access_

<span>location ~ /bb {<br><br>                <span>if</span> <span>(</span><span>$</span>args ~ <span>"&_kw=[\w]+"</span><span>)</span><span>{</span><br>                        access_log logs/kw<span>;</span><br>                        access_log logs/all<span>;</span><br>                }<br><br><br>                <span>if</span> <span>(</span><span>$</span>args ~ <span>"(&_pg=[\w]+|&_pc=[\w]+)"</span><span>)</span><span>{</span><br>                        access_log logs/pg<span>;</span><br>                        access_log logs/all<span>;</span><br>                }<br><br><br>                <span>if</span> <span>(</span><span>$</span>args ~ <span>"&_kw=[\w]+.*(&_pg=[\w]+|&_pc=[\w]+)"</span><span>)</span><span>{</span><br>                        access_log logs/kw<span>;</span><br>                        access_log logs/pg<span>;</span><br>                        access_log logs/all<span>;</span><br>                }<br><br><br>                access_log logs/all<span>;</span><br><br>        }<br></span>

<span><br></span>

http://1.1.1.1/bb?&_kw=1777&_pg=-1&_pc=1

对于上面的配置，访问上面的url时，即匹配第一个if（因为\w为[a-zA-Z0-9_]，不包含“-”，又匹配最后一个if，后面的if生效。（匹配多个if的args，后面的if生效）

验证：

<span><br>         location ~ /bb {<br> <br>                 <span>if</span> <span>(</span><span>$</span>args ~ <span>"&_kw=[\w]+"</span><span>)</span><span>{</span><br>                         access_log logs/kw<span>;</span><br>                 }<br> <br>                 <span>if</span> <span>(</span><span>$</span>args ~ <span>"&_kw=[\w]+"</span><span>)</span><span>{</span><br>                         access_log logs/kw111<span>;</span><br>                 }<br> }</span>

我没有在nginx的文档中找到明确的有关于多个if生效的规则说明，如果谁知到在什么地方，请告诉我，谢谢。

另：关于nginx location（不是多个if）的匹配规则：

http://wiki.nginx.org/NginxHttpCoreModule#location