Environment: Windows / IIS / PHP / MySQL free life is a way, so I also chose PHP. Cause, when I finished phpMyAdmin installed, the configuration file error prompts were "Client Does Not Support" Authentication Protocol Requested By Server "Solution: (Original Address http://dev.mysql.com/doc/mysql/en/old_client.html )cmd Enter the command prompt window CD c: / mysqlcd / binmysqlmysql> set Password for - > 'some_user' @ 'some_host' = Old_Password ('newpwd'); then arbitrarily selecting the following two methods: mysql> update mysql.user set password = Old_password ('newpwd') -> where host = 'some_host' and user = 'some_user'; mysql> flush privileges;