php - 为什么 "localhost"不能用作 MySQL 主机，而 "MyPCName"可以？

Question

我正在尝试从 Windows/IIS 7.5 上的 PHP (WordPress) 连接到 MySQL，结果是这样的:

define('DB_HOST', 'DevPC');        // -> works
define('DB_HOST', 'localhost');    // -> connection error

奇怪的是，在另一台机器上(Windows Server + IIS 7.5)，localhost 工作正常。是什么原因造成的？一些 PHP 设置？ MySQL 设置？

Answer 1

On Unix, MySQL programs treat the host name localhost specially, in a way that is likely different from what you expect compared to other network-based programs. For connections to localhost, MySQL programs attempt to connect to the local server by using a Unix socket file. This occurs even if a --port or -P option is given to specify a port number.

使用 127.0.0.1 而不是 localhost。