update.php

<?php
require_once 'core/init.php';

$user = new User();

if (!$user->isLoggedIn()){
	Redirect::to('index.php');  
}

if(Input::exists()){
	if(Token::check(Input::get('token'))){
		// echo 'OK!';
		$validate = new Validate();
		$validation = $validate->check($_POST,array(
				'name' => array(
				 		'required' => 'true',
				 		'min' => 2,
				 		'max'=>50
				 		)
			));

		if($validation->passed()){
			
			try {
					$user->update(array(
						'name'=>Input::get('name')
					));
					Session::flash('home','Your details have been updated');
					Redirect::to('index.php');
			} catch (Exception $e){
				die($e->getMessage());
			}

		} else{
			foreach($validation->errors() as $error){
				echo $error, '<br>';
			}
		}
	} else {
		echo "Token not received";
	}
} else {
	echo 'Input not received.';
}

?>

<form action="" method="post">
	<div class="field">
		<label for="name">Name</label>
		<input type="text" name="name" value="<?php echo escape($user->data()->name); ?>">
		<input type="submit" value="Update">
		<input type="hidden" name="token" value="<?php echo Token::generate(); ?>"
	</div>
</form>