How can PHP be used to detect and handle situations where no value is present in a database for display purposes?

When retrieving data from a database using PHP, it is important to check if the result is empty before attempting to display it. This can be done by using functions like `mysqli_num_rows()` to check the number of rows returned. If no value is present, you can handle this situation by displaying a default message or taking alternative actions. 

// Assuming $result is the variable holding the database query result

if(mysqli_num_rows($result) > 0) {
    // Display data from the database
    while($row = mysqli_fetch_assoc($result)) {
        echo $row['column_name'];
    }
} else {
    // Display a default message when no value is present
    echo "No data available.";
}

Keywords

PHP database NULL value error handling display.

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