Warning: mysql_connect(): No such file or director

说明:

本文主要内容参考: Mac下PHP连接MySQL报错＂No such file or directory＂的解决办法, 并进行个人补充

1. 运行环境: Mac OS X 10.11.4 (Mac 已经自带 Apache, PHP)

2. 相关文件夹:

 /etc/apache2/     ##Apache 配置文件夹

 /Library/WebServer/Documents/    ##Apache 默认站点 

 /usr/local/mysql-5.7.11-osx10.9-x86_64      ##mysql安装路径

 　　　　/private/php.ini.default      ##php的配置文件: 如配置 mysql.sock

 

>>问题原因:

For some reason mysql on OS X gets the locations of the required socket file a bit wrong, but thankfully the solution is as simple as setting up a symbolic link.

You may have a socket (appearing as a zero length file) as /tmp/mysql.sock or /var/mysql/mysql.sock but 1 or more apps is looking in the other location for it.

大神解释说: PHP 在 MySQL socket 方面, 默认的配置有问题. 那么现在只要修改 PHP 的配置文件, 配置正确的 MySQL socket 路径就可以了.

 

>>解决方案:

 

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():

<?php
echo 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 Mac 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 8
Server 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:		8
Current database:	
Current user:		root@localhost
SSL:			Not in use
Current pager:		less
Using outfile:		‘‘
Using delimiter:	;
Server version:		5.7.11 MySQL Community Server (GPL)
Protocol version:	10
Connection:		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（默认位置是: /private/etc/php.ini ）

cd /private/etc/

chmod +rwx php.ini             ##修改文件权限

vim php.ini

之后修改mysql.default_socket、mysqli.default_socket、pdo_mysql.default_socket 的值为: /tmp/mysql.sock

（一共修改三处，分别为：mysql.default_socket、mysqli.default_socket、pdo_mysql.default_socket）

注意:

若用 vim php.ini 打开的文件为空(我操作的时候, 就是这样), 说明没有 php.ini 这个文件

这个时候, 你浏览 /etc/ 文件夹下, 会有 php.ini.default 文件, 复制 php.ini.default 重命名为 php.ini , 再用 vim 修改文件内容

cd /private/etc/
cp php.ini.default php.ini      ##复制 php.ini.default, 并且重命名
chmod +rwx php.ini              ##修改文件权限
vim php.ini 

5,重启apache

sudo apachectl restart            ##重启 apache

解决啦!