How to solve the problem that php cannot connect to mysql

Methods to solve the problem that PHP cannot connect to MySQL: 1. Open the php.ini configuration file; 2. Modify the configuration [pdo_mysql.default_socket=/tmp/mysql.sock]; 3. Restart nginx or apache.

Cause analysis:

There is a problem with PHP configuring mysql

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Solution:

Reconfigure PHP

Specific steps:

Open the php.ini file and modify mysql.default_socket, mysqli.default_socket, The value of pdo_mysql.default_socket is: /tmp/mysql.sock

pdo_mysql.default_socket=/tmp/mysql.sock  
mysql.default_socket=/tmp/mysql.sock  
mysqli.default_socket=/tmp/mysql.sock

Or modify the socket of my.cnf:

[client]  
socket=/tmp/mysql.sock  
  
[mysqld]  
socket=/tmp/mysql.sock

Then restart nginx or apache.

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