Websocket2006年mysql server已经走了

websocket2006年MySQL server已经走了

Opened connection from mysql client to the database is not intended to be open for several hours. 
After some time the client disconnects.
Technically, when making a WebSocket request, we can do mysqli::ping - ping the connection to the server or try to reconnect if the connection is lost.

$mysqli = new mysqli("localhost", "my_user", "my_password", "world");

/* check connection */
if ($mysqli->connect_errno) {
    printf("Connect failed: %s\n", $mysqli->connect_error);
    exit();
}

/* check if server is alive */
if ($mysqli->ping()) {
    printf ("Our connection is ok!\n");
} else {
    printf ("Error: %s\n", $mysqli->error);
}

/* close connection */
$mysqli->close();