How can PDO and Prepared Statements improve security in PHP applications?

Using PDO and Prepared Statements in PHP applications can improve security by preventing SQL injection attacks. By using prepared statements, input data is treated as data rather than SQL commands, making it impossible for attackers to inject malicious SQL code. PDO also provides a layer of abstraction that helps prevent common security vulnerabilities. 

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

// Prepare a SQL statement using placeholders
$stmt = $pdo->prepare('SELECT * FROM users WHERE username = :username');

// Bind parameters to the placeholders
$stmt->bindParam(':username', $username);

// Execute the prepared statement
$stmt->execute();

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

Keywords

PDO Prepared Statements Security PHP applications SQL Injection

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