How can the code provided in the forum thread be improved to prevent SQL injections and ensure data integrity in the database?

To prevent SQL injections and ensure data integrity in the database, the code should use prepared statements with parameterized queries instead of directly inserting user input into the SQL query. This helps to sanitize the input and prevent malicious SQL code from being executed. 

// Original code
$stmt = $pdo->prepare("INSERT INTO users (username, password) VALUES ('$username', '$password')");
$stmt->execute();

// Improved code using prepared statements
$stmt = $pdo->prepare("INSERT INTO users (username, password) VALUES (:username, :password)");
$stmt->bindParam(':username', $username);
$stmt->bindParam(':password', $password);
$stmt->execute();

Keywords

SQL injection data integrity database security prepared statements PDO.

Related Questions