How can errors like "3 is not a valid MySQL result resource" be resolved in PHP?

The error "3 is not a valid MySQL result resource" typically occurs when trying to use a result set that is not valid. This can happen if the query fails to execute properly or if there is an issue with the connection to the database. To resolve this error, you should check for errors in your SQL query, ensure that the connection to the database is established correctly, and handle any potential errors that may arise during the query execution.

// Example code snippet to handle the error "3 is not a valid MySQL result resource"
$query = "SELECT * FROM table_name";
$result = mysqli_query($connection, $query);

if (!$result) {
    die("Error: " . mysqli_error($connection));
}

// Use the result set here