How can SQL Injections be prevented when writing PHP code for database interactions?

SQL Injections can be prevented in PHP code by using prepared statements with parameterized queries. This approach separates the SQL query logic from the user input, making it impossible for malicious input to alter the structure of the query. 

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

// Prepare a SQL statement 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 PHP code Database interactions Prepared statements Parameterized queries

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