What is the significance of specifying all fields explicitly in a SELECT query in PHP?

Specifying all fields explicitly in a SELECT query in PHP is significant for several reasons. It helps improve the readability and maintainability of the code by clearly indicating which fields are being retrieved from the database. It also reduces the chances of errors or unexpected behavior when the database schema changes, as the query will only fetch the specified fields. Additionally, explicitly specifying fields can improve query performance by only retrieving the necessary data.

// Explicitly specify all fields in the SELECT query
$query = "SELECT field1, field2, field3 FROM table_name";
$result = mysqli_query($connection, $query);

// Process the query result
if (mysqli_num_rows($result) > 0) {
    while ($row = mysqli_fetch_assoc($result)) {
        // Access the retrieved fields using $row['field1'], $row['field2'], $row['field3']
    }
} else {
    echo "No results found.";
}