本文操作环境：Windows7系统、PHP5.5.34版、DELL G3电脑
php mysql上不去怎么办？
PHP连接不上MySQL解决方案总结
1. 获取当前 mysql.default_socket、mysqli.default_socket、pdo_mysql.default_socket 配置信息
建立一个 PHP 文件, 显示 phpinfo():
用浏览器打开:
在此页面，找到mysql.default_socket、mysqli.default_socket、pdo_mysql.default_socket信息:
2. 获取 MySQL socket 路径
通过控制台进入 MySQL, 输入命令: STATUS, 查找 UNIX socket 值
#mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 8Server version: 5.7.11 MySQL Community Server (GPL)
Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement.
mysql> STATUS--------------mysql Ver 14.14 Distrib 5.7.11, for osx10.9 (x86_64) using EditLine wrapper
Connection id: 8Current database:
Current user: root@localhost
SSL: Not in use
Current pager: lessUsing outfile: ‘‘
Using delimiter: ;
Server version: 5.7.11 MySQL Community Server (GPL)
Protocol version: 10Connection: Localhost via UNIX socket
Server characterset: utf8
Db characterset: utf8
Client characterset: utf8
Conn. characterset: utf8
UNIX socket: /tmp/mysql.sock
Uptime: 8 days 15 hours 1 min 17 sec
Threads: 2 Questions: 21 Slow queries: 0 Opens: 114 Flush tables: 1 Open tables: 0 Queries per second avg: 0.000--------------3. 这时候, 你对比 mysql.default_socket、mysqli.default_socket、pdo_mysql.default_socket 和 通过 MySQL UNIX socket 发现不一样, 这就是 mysql_connect(); 警告的原因: PHP 配置 mysql 有问题.
4. 重新配置 PHP, 打开php.ini修改mysql.default_socket、mysqli.default_socket、pdo_mysql.default_socket 的值为: /tmp/mysql.sock
pdo_mysql.default_socket=/tmp/mysql.sock
mysql.default_socket=/tmp/mysql.sock
mysqli.default_socket=/tmp/mysql.sock或者修改my.cnf的socket：
[client]
socket=/tmp/mysql.sock
[mysqld]
socket=/tmp/mysql.sock5.重启nginx或者apache
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