将php.ini 中的

1
expose_php = On

改为

1
expose_php = Off

关于expose_php这个选项：

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; 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