What potential issue is the user facing with the PHP script for adding users to a database?

The potential issue the user is facing with the PHP script for adding users to a database is that the script is vulnerable to SQL injection attacks. To solve this issue, the user should use prepared statements with parameterized queries to securely insert user data into the database. 

// Connect to the database
$pdo = new PDO('mysql:host=localhost;dbname=your_database', 'username', 'password');

// Prepare the SQL statement with parameters
$stmt = $pdo->prepare("INSERT INTO users (username, email) VALUES (:username, :email)");

// Bind parameters
$stmt->bindParam(':username', $username);
$stmt->bindParam(':email', $email);

// Set the parameters and execute the statement
$username = "example_user";
$email = "user@example.com";
$stmt->execute();

Keywords

SQL injection PDO prepared statements database connection error handling

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