whatsns(原ask2问答系统)一直被模仿，从未被超越
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Nginx核心规则：
if (!-e $request_filename) {
rewrite ^/二级目录/(.*)$ /二级目录/index.php?$1 last;
rewrite ^/(.*)$ /index.php?$1;
}
参考宝塔中如何设置，以nginx为例：
如果使用非可视化面板设置伪静态，请将伪静态规则放到
location / {
if (!-e $request_filename) {
rewrite ^/kc/(.*)$ /kc/index.php?$1 last;
rewrite ^/(.*)$ /index.php?$1;
}
}