How can PHP developers protect their code from SQL Injection attacks?

To protect their code from SQL Injection attacks, PHP developers should use prepared statements with parameterized queries instead of directly inserting user input into SQL queries. This helps to separate SQL logic from user input, preventing malicious SQL code from being executed. 

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

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

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

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

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

Keywords

SQL Injection PHP security Prepared statements PDO Escaping inputs

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