server {
    ## ...
    location ~ [^/]\.php(/|$) {
        # 添加CORS头部
        add_header 'Access-Control-Allow-Origin' '*' always; 
        add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS' always; 
        add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type' always; 
        add_header 'Access-Control-Max-Age' 1728000 always; 
        # 处理预检请求
        if ($request_method = 'OPTIONS' ) {
            return 204; 
        }
        ## ...
    }
    ## ...
}