How can PHP developers optimize the code for extracting and displaying specific metadata values from a database in a more efficient way?

To optimize the code for extracting and displaying specific metadata values from a database in a more efficient way, PHP developers can utilize SQL queries that specifically target the required metadata fields and use proper indexing on the database tables. Additionally, caching the retrieved metadata values can reduce the number of database calls and improve performance.

// Assume $conn is the database connection object

// Query to fetch specific metadata values from the database
$query = "SELECT metadata_field1, metadata_field2 FROM metadata_table WHERE condition = 'specific_condition'";
$result = mysqli_query($conn, $query);

// Check if query was successful
if ($result) {
    // Fetch and display the metadata values
    while ($row = mysqli_fetch_assoc($result)) {
        echo "Metadata Field 1: " . $row['metadata_field1'] . "<br>";
        echo "Metadata Field 2: " . $row['metadata_field2'] . "<br>";
    }
} else {
    // Handle query error
    echo "Error fetching metadata values: " . mysqli_error($conn);
}

// Free the result set
mysqli_free_result($result);

// Close the database connection
mysqli_close($conn);