php.ini
safe_mode = On
; By default, Safe Mode does a UID compare check when
; opening files. If you want to relax this to a GID compare,
; then turn on safe_mode_gid.
safe_mode_gid = Off
; When safe_mode is on, UID/GID checks are bypassed when
; including files from this directory and its subdirectories.
; (directory must also be in include_path or full path must
; be used when including)
safe_mode_include_dir =
; When safe_mode is on, only executables located in the safe_mode_exec_dir
; will be allowed to be executed via the exec family of functions.
safe_mode_exec_dir =
; open_basedir, if set, limits all file operations to the defined directory
; and below. This directive makes most sense if used in a per-directory
; or per-virtualhost web server configuration file.
;
open_basedir =
safe_mode_include_dir =
safe_mode_exec_dir =
open_basedir =
那个后面加不开放php权限的目录
open_basedir 用来指定只在某一个目录中执行PHP
对不需要开放PHP权限的目录，在PHP的 Apache-specific Functions 章节中有以下一句：
引用:
The behaviour of the Apache PHP module is affected by settings in php.ini. Configuration settings from php.ini may be overridden by php_flag settings in the server configuration file or local .htaccess files.
接着，有一个示例
引用:
php_flag engine off
引用:
engine boolean
This directive is really only useful in the Apache module version of PHP. It is used by sites that would like to turn PHP parsing on and off on a per-directory or per-virtual server basis. By putting engine off in the appropriate places in the httpd.conf file, PHP can be enabled or disabled.
因此，我们只需要在不需要PHP权限的目录或者虚拟主机设置段（目录为<Directory>,虚拟主机为<VirualHost>)中加上
代码:
php_flag engine off
