Solution to mysql prompt "got timeout reading communication packets"

Error message:
user: 'root' host: `localhost' (Got timeout reading communication packets)
MYSQL server has gone away

The cause of this is not terrible. The reason is that the system disconnection time has been changed.

mysql>show gloable variables like "%timeout%";
View
The default value for interactive_timeout is 28800
The default value of wait_timeout is: 120

Increase it according to the situation.
These two values ​​are global variables and can be increased dynamically, such as:
mysql> set global interactive_timeout=28800;
Query OK, 0 rows affected (0.00 sec)
mysql> show global variables like "interactive_timeout";
+---------------------+-------+
| Variable_name | Value |
+---------------------+-------+
| interactive_timeout | 28800 |
+---------------------+-------+
1 row in set (0.00 sec)

Causes of the Got timeout reading communication packets error

https://dev.mysql.com/doc/refman/5.5/en/communication-errors.html

There are several possible reasons for the Got Timeout reading communication packets error:

A client attempts to access a database but has no privileges for it.

A client uses an incorrect password.

A connection packet does not contain the right information.

It takes more than connect_timeout seconds to obtain a connect packet.

The client program did not call mysql_close() before exiting.

The client had been sleeping more than wait_timeout or interactive_timeout seconds without issuing any requests to the server.

The client program ended abruptly in the middle of a data transfer.

Troubleshooting:

The problem was caused by the PHP functions on our mobile version being out of sync with the PHP functions on the PC version, so a careful check solved the problem.