What are some considerations when dynamically changing database entries based on user interactions in PHP?

When dynamically changing database entries based on user interactions in PHP, it is important to validate and sanitize user input to prevent SQL injection attacks. Additionally, consider using prepared statements to securely interact with the database. Lastly, ensure that the database connection is properly established and closed to avoid potential security vulnerabilities. 

// Example PHP code snippet for dynamically changing database entries based on user interactions

// Establish database connection
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database";

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

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

// Sanitize user input
$user_input = mysqli_real_escape_string($conn, $_POST['user_input']);

// Prepare SQL statement
$stmt = $conn->prepare("UPDATE table SET column = ? WHERE id = ?");
$stmt->bind_param("si", $user_input, $id);

// Execute SQL statement
$stmt->execute();

// Close statement and connection
$stmt->close();
$conn->close();

Keywords

SQL injection prepared statements PDO AJAX event listeners

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