What are some potential pitfalls when dealing with character encoding in PHP databases?

When dealing with character encoding in PHP databases, some potential pitfalls include mismatched character sets between the database and PHP, incorrect collation settings, and improper handling of special characters. To ensure proper encoding, always set the character set and collation for the database connection, sanitize user input to prevent SQL injection attacks, and use prepared statements for database queries. 

// Set character set and collation for the database connection
$pdo = new PDO("mysql:host=localhost;dbname=mydatabase;charset=utf8mb4", "username", "password");

// Sanitize user input to prevent SQL injection attacks
$user_input = $_POST['user_input'];
$clean_input = $pdo->quote($user_input);

// Use prepared statements for database queries
$stmt = $pdo->prepare("SELECT * FROM users WHERE username = :username");
$stmt->bindParam(':username', $clean_input);
$stmt->execute();

Keywords

UTF-8 character encoding PHP database SQL injection

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