How can PHP developers ensure secure database interactions and prevent vulnerabilities like SQL injection?

To ensure secure database interactions and prevent vulnerabilities like SQL injection, PHP developers should use prepared statements with parameterized queries. This technique separates SQL code from user input, preventing malicious SQL injection attacks. 

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

// Prepare a SQL query with a placeholder for user input
$stmt = $pdo->prepare('SELECT * FROM users WHERE username = :username');

// Bind the user input to the placeholder
$stmt->bindParam(':username', $_POST['username']);

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

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

Keywords

SQL injection prepared statements PDO input validation parameterized queries

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