// Connect to database using PDO $pdo = new PDO("mysql:host=localhost;dbname=mydb", "user", "password"); // Prepare update query $stmt = $pdo->prepare("UPDATE users SET username = :username, email = :email WHERE id = :id"); // Bind parameters to query $stmt->bindParam(":username", $username); $stmt->bindParam(":email", $email); $stmt->bindParam(":id", $id); // Set values for parameters $username = "newusername"; $email = "newemail@example.com"; $id = 1; // Execute update query $stmt->execute();In this example, we are using PDO to update a user's username and email address in a MySQL database. We first connect to the database using PDO and prepare an update query with placeholders for the username, email, and user ID. We then bind the parameters to the corresponding placeholders using the bindParam() method. Finally, we specify the values for the parameters and execute the query using the execute() method. Other popular packages/libraries for user update in PHP include Doctrine ORM, Laravel Eloquent, and Symfony Doctrine. These packages provide advanced mapping and query functionalities for handling user input and database updates in PHP.