How to close redis connection in php

When using Redis, we must establish a Redis client, establish a connection with the server, and maintain this connection status in order to read and write data. However, if the connection is not closed correctly, it will cause some problems, such as the connection occupying too much server memory resources, and it may result in the inability to connect to the Redis server. Therefore, if you use the Redis service using PHP language, it is necessary to close the connection in time.

To close the Redis connection, we can use the close method of the Redis class. Here is some sample code to illustrate how to close a Redis connection:

<?php

$redis = new Redis();
$redis->connect('127.0.0.1', 6379);
// 执行一些 Redis 操作
// ...
$redis->close(); // 关闭 Redis 连接

?>

In the above sample code, we established the connection using the connect method, performed some Redis operations, and finally used close method closes the connection. You can also use the pconnect method to open a long connection, but you also need to close the connection at the appropriate time.

If you need to close the Redis connection, you also need to pay attention to the following:

• If you use multiple Redis instances, you need to manually close each connection.
• After closing the connection, you can no longer use the $redis object to perform Redis operations, otherwise an exception RedisException: Connection closed will occur.
• If your PHP program crashes or terminates during execution, you need to use try...catch to catch the exception and close the connection.

In short, closing the Redis connection is very important to avoid some potential problems and security risks. When developing PHP applications, it is recommended that you follow best practices and close the Redis connection promptly after opening it to improve the stability and reliability of the application.

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