错误，同时连接到MySQL

Question

这里是代码

<?php 
    $con = mysqli_connect("******.com","user","pass","db"); 
    echo mysqli_connect_error(); 
?> 

和我回去（由回声）

Host '*****************' is blocked because of many connection errors; unblock with 'mysqladmin flush-hosts'

，这里是在错误日志文件中的文本

[04-Nov-2014 21:30:22 UTC] PHP Warning: mysqli_connect(): (HY000/1129): Host '*******************' is blocked because of many connection errors; unblock with 'mysqladmin flush-hosts' in /home/******/public_html/test.php on line 2

and

[04-Nov-2014 21:18:30 UTC] PHP Warning: mysqli_connect(): (28000/1045): Access denied for user 'user'@'******************' (using password: YES) in /home/*******/public_html/test.php on line 2

怎么了？
我该怎么办？

Answer 1

你的IP被封锁，因为你已经尝试登录到MySQL服务器太多次不正确的用户名/密码，按错误：

Host '*****************' is blocked because of many connection errors; unblock with 'mysqladmin flush-hosts'

要修复，登录到你的MySQL服务器控制台并执行FLUSH HOSTS命令。

如果这是共享主机，删除和重新创建数据库将工作。根据我自己的经验，许多网络主机往往会说你的MySQL数据库是，这是你的问题。除非你想等待你的主机解锁IP，否则我建议你导出数据库中的所有数据并删除数据库，重新创建数据库并从你导出的文件中导入数据。

From the official documentation:

The value of the max_connect_errors system variable determines how many successive interrupted connection requests are permitted. (See Section 5.1.4, “Server System Variables”.) After max_connect_errors failed requests without a successful connection, mysqld assumes that something is wrong (for example, that someone is trying to break in), and blocks the host from further connections until you issue a FLUSH HOSTS statement or execute a mysqladmin flush-hosts command.

By default, mysqld blocks a host after 10 connection errors. You can adjust the value by setting max_connect_errors at server startup:

shell> mysqld_safe --max_connect_errors=10000 & The value can also be set at runtime:

mysql> SET GLOBAL max_connect_errors=10000; If you get the Host 'host_name' is blocked error message for a given host, you should first verify that there is nothing wrong with TCP/IP connections from that host. If you are having network problems, it does you no good to increase the value of the max_connect_errors variable.