Can’t connect to local MySQL server through socket
问题描述 php通过localhost连接本地数据库的时候无法连接 问题分析 php以localhost方式连接本地数据库是通过socket连接的,所以必须要找到mysql对应的socket文件。php通过mysql,mysqli,pdo_mysql三种不同库以localhost方式连接mysql会去读php.ini文件里面对
问题描述
php通过localhost连接本地数据库的时候无法连接
问题分析
php以localhost方式连接本地数据库是通过socket连接的,所以必须要找到mysql对应的socket文件。php通过mysql,mysqli,pdo_mysql三种不同库以localhost方式连接mysql会去读php.ini文件里面对应的设置default-socket 。我的php和mysql都是编译的方式安装的,当时没有指定mysql的socket文件的位置,mysql生成该文件的位置和php里面的默认值(/tmp/mysql.sock)设置不一样,从而导致二者之间无法通行。
解决方法
1.通过IP地址进行连接。例如mysql_connect(‘127.0.0.1′,’root’,”);
2.明确指定mysql的socket文件地址。
首先找到mysql的socket文件地址
sudo find / -name mysqld.sock或者
echo “show variables” | mysql -uroot -ppassword| grep “socket”
返回mysql的socket文件地址如下
/run/mysqld/mysqld.sock
然后在php.ini文件里面一下三个地方做出修改
mysql.default_socket、mysqli.default_socket、pdo_mysql.default_socket
3.修改my.cnf中socket ? ? ? ? ?= /var/run/mysqld/mysqld.sock(好几个地方都有这个参数,不建议修改)
4.做软链接
ln -s?/var/run/mysqld/mysqld.sock?/tmp/mysql?.sock
毫无疑问,第一种方式最简单
原文地址:Can’t connect to local MySQL server through socket, 感谢原作者分享。

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