What potential pitfalls should be avoided when passing data through POST in PHP?

One potential pitfall to avoid when passing data through POST in PHP is not properly sanitizing user input, which can leave your application vulnerable to SQL injection attacks. To prevent this, always use prepared statements or parameterized queries when interacting with a database to securely handle user input. 

// Example of using prepared statements to prevent SQL injection
$stmt = $pdo->prepare('SELECT * FROM users WHERE username = :username');
$stmt->bindParam(':username', $_POST['username']);
$stmt->execute();

Keywords

XSS SQL injection CSRF data validation secure coding practices

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