How can PHP developers ensure that data stored in a database is safely displayed in HTML without compromising security?

To ensure that data stored in a database is safely displayed in HTML without compromising security, PHP developers should use prepared statements with parameterized queries to prevent SQL injection attacks. This method helps sanitize user input and ensures that data is properly escaped before being displayed on the webpage. 

// Establish a database connection
$pdo = new PDO("mysql:host=localhost;dbname=mydatabase", "username", "password");

// Prepare a statement with parameterized query
$stmt = $pdo->prepare("SELECT * FROM users WHERE id = :id");

// Bind the parameter value
$stmt->bindParam(':id', $id, PDO::PARAM_INT);

// Execute the query
$stmt->execute();

// Fetch and display the data
while ($row = $stmt->fetch()) {
    echo htmlentities($row['username']); // Sanitize data before displaying
}

Keywords

SQL injection htmlspecialchars prepared statements XSS attacks data sanitization

Related Questions