<?php

namespace routers;

use models\Exemple;
$app->get('/', function ($request, $response) {
    $response->write("Hello, Everybody");
    return $response;
});
$app->get('/hello/{name}', function ($request, $response, $args) {
    $response->write("Hello, " . $args['name']);
    return $response;
});
$app->get('/atome', function ($request, $response, $args) {
    $ex = new Exemple();
    $data = $ex->getAllData();
    echo json_encode($data);
});
$app->get('/atome/{name}', function ($request, $response, $args) {
    $ex = new Exemple();
    $data = $ex->getData($args['name']);
    echo json_encode($data);
});
<?php

namespace routers;

use models\Exemple;
$app->get('/', function () {
    echo "Hello, everybody !";
});
$app->get('/hello/:name', function ($name) {
    echo "Hello, " . $name;
});
$app->get('/atome', function () use($app) {
    $ex = new Exemple();
    $data = $ex->getAllData();
    echo json_encode($data);
});
$app->get('/atome/:name', function ($name) use($app) {
    $ex = new Exemple();
    $data = $ex->getData($name);
    echo json_encode($data);
});