What are the potential benefits and drawbacks of storing email signatures centrally on a server for users, compared to storing them locally on client devices?

Storing email signatures centrally on a server for users can provide consistency across devices, easy management and updates, and the ability to track usage. However, drawbacks may include potential privacy concerns, dependency on server availability, and limited customization options for individual users. 

// Example PHP code snippet to store email signatures centrally on a server for users

// Connect to the database
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "email_signatures";

$conn = new mysqli($servername, $username, $password, $dbname);

// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

// Query to retrieve email signature for a specific user
$user_id = 1;
$sql = "SELECT signature FROM signatures WHERE user_id = $user_id";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    // Output data of each row
    while($row = $result->fetch_assoc()) {
        echo "Email signature: " . $row["signature"];
    }
} else {
    echo "No email signature found for user";
}

$conn->close();

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