// $_POST = ['id' => 1, 'name' => 'Valera']
use Sivka\Request;

echo Request::post('name'); // Valera

$post = Request::post();

echo $post->name; // Valera

echo $post->not_defined_var; // NULL

Request::get(); // $_GET
Request::post(); // $_POST
Request::files(); // $_FILES
Request::session(); // $_SESSION
Request::cookie(); // $_COOKIE
Request::server(); // $_SERVER
Request::headers(); // http headers

$post = Request::post();
$post->set('id', 2);
// or directly
$post->id = 2;

// array maybe used
$newData = ['surname' => 'Smith', 'age' => 33];
$post->set($newData);

echo $post->int('id'); // 2

echo $post->string('id'); // '2'

echo $post->get('id'); // 2
// or simply
echo $post->id; // 2

echo $post->get('notDefined', 'define_me'); // define_me

$post->count();

$post->toJson();

$post->toArray();

$post->delete('id');

echo $post->has('name'); // true

$post->keys();

$id = isset($_POST['id']) ? (int)$_POST['id'] : 0;