Are there any potential security risks associated with retrieving database information in PHP?

When retrieving database information in PHP, one potential security risk is SQL injection, where malicious SQL queries are injected into the input fields. To prevent this, you should always use prepared statements with parameterized queries to sanitize user input and prevent SQL injection attacks. 

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

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

// Bind the parameter and execute the query
$stmt->bindParam(':username', $_POST['username']);
$stmt->execute();

// Fetch the results
$results = $stmt->fetchAll();

Keywords

SQL injection prepared statements PDO mysqli data sanitization

Related Questions