我们配置php环境的时候往往都会写phpinfo（）；这个函数来测试php环境是否安装成功，但往往这个函数也会给系统带来安全隐患，那么如何让关掉这个函数呢？下面介绍一种方法：
修改php.ini文件，在里面找到如下行，
disable_functions = ; This directive allows you to disable certain
; functions for security reasons. It receives
; a comma separated list of function names.
; This directive is *NOT* affected by whether
; Safe Mode is turned on or off.
将其写成
disble_functions = phpinfo
重启apache就能实现屏蔽phpinfo（）；函数了。
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