linux服务器上的“无法通过套接字连接到本地MySQL服务器”

Question

I'm having a hard time getting my website connected to the mySQL database on host. However, when I was running my website on the PC by Apache it was connecting smoothly. The snippet I'm using to connect is:

<?php
    $conn_error = 'Could not connect';

    $mysql_host = 'localhost';
    $mysql_user = 'root';
    $mysql_pass = '';

    $mysql_db = 'firstdatabase';

    if(!mysql_connect($mysql_host,$mysql_user,$mysql_pass)|| !@mysql_select_db($mysql_db)){
        die($conn_error);
    }else{
        //echo 'Connected';
    }
?>

And it gives me the following error when I try to connect to mysql on the web host:

Warning: mysql_connect() [function.mysql-connect]: Can't connect to local MySQL server
through socket 'MySQL' (2) in /home/umudo/public_html/connectserver.inc.php on line 10

I searched through the web for finding a solution but couldn't find any exact example of this.

Answer 1

Help: http://dev.mysql.com/doc/refman/5.0/en/connecting.html

Says:

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.

So you have to

• use "127.0.0.1" instead of "localhost" to use tcpip instead of sockets, or
• enable sockets in mysql server config (socket connections are probably disabled and that causes that error on linux)

Second method is better - using sockets for local connections is better than TCP/IP (better performance), but you may have no privileges to mysql configuration on that server.

Answer 2

尝试像apt-get install phpmyadmin中一样安装phpmyadmin或php5-mysql。