server_tokens off;

client_max_body_size 1024M;

Nginx版本隐藏

server_tokens on;

PHP版本隐藏

; Decides whether PHP may expose the fact that it is installed on the server
; (e.g. by adding its signature to the Web server header). It is no security
; threat in any way, but it makes it possible to determine whether you use PHP
; on your server or not.
; http://php.net/expose-php
expose_php = Off

深入理解SELECT … LOCK IN SHARE MODE和SELECT … FOR UPDATE

SELECT * FROM information_schema.INNODB_TRX