No.2:
location ^~ /foldername/ {
         auth_basic "Given me password.";
         auth_basic_user_file /usr/local/nginx/conf/custom/store.htpasswd;
         include /usr/local/nginx/conf/php54.conf;
}
foldername 根據要加密的資料夾做更改
store.htpasswd 帳密檔名