What are common pitfalls when using $_POST in PHP for form submissions?

One common pitfall when using $_POST in PHP for form submissions 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 your database. Additionally, make sure to validate and sanitize all user input before using it in your application. 

// Example of using prepared statements to prevent SQL injection
$stmt = $pdo->prepare("INSERT INTO users (username, email) VALUES (:username, :email)");
$stmt->bindParam(':username', $_POST['username']);
$stmt->bindParam(':email', $_POST['email']);
$stmt->execute();

Keywords

$_POST form submissions security vulnerabilities data validation injection attacks

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