安全攻略：PHP脚本木马的高级防范
1、防止跳出web目录
首先修改httpd.conf，假如你只答应你的php脚本程序在web目录里操作，还可以修改httpd.conf文件限制php的操作路径。比如你的web目录是/usr/local/apache/htdocs，那么在httpd.conf里加上这么几行：
php_admin_value open_basedir /usr/local/apache/htdocs
这样，假如脚本要读取/usr/local/apache/htdocs以外的文件将不会被答应，假如错误显示打开的话会提示这样的错误：
Warning: open_basedir restriction in effect. File is in wrong directory in /usr/local/apache/htdocs/open.php on line 4 等等。
2、防止php木马执行webshell
打开safe_mode，
在，php.ini中设置
disable_functions= passthru，exec，shell_exec，system
二者选一即可，也可都选
3、防止php木马读写文件目录
在php.ini中的
disable_functions= passthru，exec，shell_exec，system
后面加上php处理文件的函数
主要有
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