php连接mysql报错No such file or directory

php测试文件如下：

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<?php $con = mysql_connect("localhost","root","zengjie2"); if (!$con) {     die('Could not connect: ' . mysql_error()); } else {     echo "ok"; } ?>

访问后提示：

1 2	Warning: mysql_connect(): No such file or directory in /usr/local/nginx/html/mysql.php on line 3 Could not connect: No such file or directory

解决方法：

登陆mysql

输入status，输出如下

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Connection id:   4 Current database: Current user:    root@localhost SSL:     Not in use Current pager:   stdout Using outfile:   '' Using delimiter:    ; Server version:  5.1.73 Source distribution Protocol version:   10 Connection:  Localhost via UNIX socket Server characterset:    latin1 Db     characterset:    latin1 Client characterset:    latin1 Conn.  characterset:    latin1 UNIX socket:     /var/lib/mysql/mysql.sock Uptime:  14 min 29 sec

记下UNIX socket路径  /var/lib/mysql/mysql.sock

查看/tmp/mysql.sock,不存在这个文件，那么建个Link

1 2	cd /tmp ln -s /var/lib/mysql/mysql.sock mysql.sock

重新访问php文件，成功连接。

以上是一种情况，另外一种情况： 存在/tmp/mysql.sock 但是不存在 /var/lib/mysql/mysql.sock

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cd /var/lib mkdir mysql cd mysql ln -s /tmp/mysql.sock mysql.sock