How can the handling of database queries and result sets be optimized to avoid warnings like "mysqli_fetch_array() expects parameter 1 to be mysqli_result"?

To avoid warnings like "mysqli_fetch_array() expects parameter 1 to be mysqli_result," ensure that the query is executed successfully before trying to fetch results. You can check if the query was successful by using the `mysqli_query()` function and then proceed to fetch results using `mysqli_fetch_array()`.

$query = "SELECT * FROM table_name";
$result = mysqli_query($connection, $query);

if($result) {
    while($row = mysqli_fetch_array($result)) {
        // Process each row here
    }
} else {
    echo "Error executing query: " . mysqli_error($connection);
}