What are the potential pitfalls of mixing PDO and MySQLi methods in PHP code?

Mixing PDO and MySQLi methods in PHP code can lead to confusion, inconsistency, and potential errors in the codebase. It is recommended to choose one database extension (either PDO or MySQLi) and stick with it for the entire project to maintain code readability and consistency. 

// Example of using only PDO methods in PHP code
try {
    $pdo = new PDO("mysql:host=localhost;dbname=mydatabase", "username", "password");
    $stmt = $pdo->prepare("SELECT * FROM users");
    $stmt->execute();
    $users = $stmt->fetchAll(PDO::FETCH_ASSOC);
    
    foreach ($users as $user) {
        echo $user['username'] . "<br>";
    }
} catch (PDOException $e) {
    echo "Error: " . $e->getMessage();
}

Keywords

PDO MySQLi methods PHP code compatibility

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