mysqli_ping mysqli->ping Pings a server connection, or tries to reconnect if the connection has gone down. Procedural style: intmysqli_ping objectlink Object oriented style (method): mysqli intping void Checks whether the connection to the server is working. If it has gone down, an automatic reconnection is attempted. This function can be used by clients that remain idle for a long while, to check whether the server has closed the connection and reconnect if necessary. mysqli_ping returns 0 if the connection is alive and non-zero value if an error has occured.