nginx automatically converted the 405 status code I returned into 200

<code>$.ajax({
     url:  jsui.www + 'comment/add',
     data: $(this).serialize(),
     type: $(this).attr('method'),
     error: function(request) {
            $('.comt-loading').slideUp(300);
            $('.comt-error').slideDown(300).html(request.responseText);
     },
     success: function(data) {...}
     ...</code>

<code>public function add()
{
        //header('HTTP/1.1 405 Method Not Allowed');
        //echo 'Content';
        //exit;  //这样写也返回200
        
        $response = new Response(
            'Content405!',
            Response::HTTP_METHOD_NOT_ALLOWED,
            array('content-type' => 'text/html')
        );
        //var_dump($response);die();
        return $response;
 }</code>

<code>http {
    include       mime.types;
    default_type  application/octet-stream;

    #log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
    #                  '$status $body_bytes_sent "$http_referer" '
    #                  '"$http_user_agent" "$http_x_forwarded_for"';

    #access_log  logs/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    #keepalive_timeout  0;
    keepalive_timeout  65;

    #gzip  on;

    server {
        listen       8080;
        server_name  localhost;

        #charset koi8-r;

        #access_log  logs/host.access.log  main;

        location / {
            root   E:\Nginx\www;
            index  index.html index.htm index.php;
            if (!-e $request_filename) {
                #一级目录下
                #rewrite ^/(.*)$ /index.php/$1 last;
                #域名下的二级目录
                rewrite ^/newblog/web/(.*)$ /newblog/web/index.php/$1 last;
            }
        }

        #error_page  404              /404.html;

        # redirect server error pages to the static page /50x.html
        #
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }

        # proxy the PHP scripts to Apache listening on 127.0.0.1:80
        #
        #location ~ \.php$ {
        #    proxy_pass   http://127.0.0.1;
        #}

        # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
        #
        location ~ \.php {
            root           E:\Nginx\www;
            fastcgi_pass   127.0.0.1:9000;
            fastcgi_index  index.php;
            fastcgi_split_path_info ^(.+\.php)(.*)$;        #增加这一句
            fastcgi_param  PATH_INFO $fastcgi_path_info;    #增加这一句
            fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
            include        fastcgi_params;
        }</code>

<code>$.ajax({
     url:  jsui.www + 'comment/add',
     data: $(this).serialize(),
     type: $(this).attr('method'),
     error: function(request) {
            $('.comt-loading').slideUp(300);
            $('.comt-error').slideDown(300).html(request.responseText);
     },
     success: function(data) {...}
     ...</code>

<code>public function add()
{
        //header('HTTP/1.1 405 Method Not Allowed');
        //echo 'Content';
        //exit;  //这样写也返回200
        
        $response = new Response(
            'Content405!',
            Response::HTTP_METHOD_NOT_ALLOWED,
            array('content-type' => 'text/html')
        );
        //var_dump($response);die();
        return $response;
 }</code>

<code>http {
    include       mime.types;
    default_type  application/octet-stream;

    #log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
    #                  '$status $body_bytes_sent "$http_referer" '
    #                  '"$http_user_agent" "$http_x_forwarded_for"';

    #access_log  logs/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    #keepalive_timeout  0;
    keepalive_timeout  65;

    #gzip  on;

    server {
        listen       8080;
        server_name  localhost;

        #charset koi8-r;

        #access_log  logs/host.access.log  main;

        location / {
            root   E:\Nginx\www;
            index  index.html index.htm index.php;
            if (!-e $request_filename) {
                #一级目录下
                #rewrite ^/(.*)$ /index.php/$1 last;
                #域名下的二级目录
                rewrite ^/newblog/web/(.*)$ /newblog/web/index.php/$1 last;
            }
        }

        #error_page  404              /404.html;

        # redirect server error pages to the static page /50x.html
        #
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }

        # proxy the PHP scripts to Apache listening on 127.0.0.1:80
        #
        #location ~ \.php$ {
        #    proxy_pass   http://127.0.0.1;
        #}

        # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
        #
        location ~ \.php {
            root           E:\Nginx\www;
            fastcgi_pass   127.0.0.1:9000;
            fastcgi_index  index.php;
            fastcgi_split_path_info ^(.+\.php)(.*)$;        #增加这一句
            fastcgi_param  PATH_INFO $fastcgi_path_info;    #增加这一句
            fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
            include        fastcgi_params;
        }</code>