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_
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<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>$</span>args ~ <span>"&_kw=[\w]+.*(&_pg=[\w]+|&_pc=[\w]+)"</span><span>)</span><span>{</span><br> access_log logs/kw<span>;</span><br> access_log logs/pg<span>;</span><br> access_log logs/all<span>;</span><br> }<br><br><br> access_log logs/all<span>;</span><br><br> }<br></span>
<span><br></span>
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http://1.1.1.1/bb?&_kw=1777&_pg=-1&_pc=1
对于上面的配置，访问上面的url时，即匹配第一个if（因为\w为[a-zA-Z0-9_]，不包含“-”，又匹配最后一个if，后面的if生效。（匹配多个if的args，后面的if生效）
验证：
<span><br>
location ~ /bb {<br>
<br>
<span>if</span> <span>(</span><span>$</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>
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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
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