In the provided PHP code, what improvements can be made to the logic of checking and handling the retrieved data from the database for better functionality and reliability?

The issue with the current logic is that it doesn't check if the database query was successful or if any data was retrieved before attempting to access and use that data. To improve functionality and reliability, we should add checks to ensure that the query was successful and that data was retrieved before proceeding with handling the retrieved data. 

// Check if the database query was successful and if data was retrieved before proceeding
if ($result !== false && $result->num_rows > 0) {
    // Fetch and process the retrieved data
    while ($row = $result->fetch_assoc()) {
        // Handle the retrieved data here
    }
} else {
    // Handle the case where no data was retrieved or the query was unsuccessful
    echo "No data found or query unsuccessful.";
}

Keywords

PHP database data retrieval error handling optimization

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