How to Check Whether mysqli connection is open before closing it

Question

I am going to use mysqli_close($connection) to close the $connection. But Before Closing I need to ensure that the concerned connection is open.

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Answer 1

Try this:

function close_connection(){
    $thread = $mysqli->thread_id;
    $mysqli->close();
    $mysqli->kill($thread);

}

That will close the connection you opened using object oriented style like this:

$mysqli = new mysqli($db_server, $db_username, $db_password, $db_name);

That's the basic idea, but if you're using the procedural style, I'm sure you'll be able to custom the code as you need.