$app = new Silex\Application(); $app['data'] = ['key1' => 'value1', 'key2' => 'value2']; if ($app->offsetExists('data')) { // Do something with the data array }
$app = new Silex\Application(); $app['data'] = ['foo' => ['bar' => 'baz']]; if ($app->offsetExists('data')) { if ($app['data']['foo']['bar']) { // Do something with the 'baz' value } }In this example, we create a nested data array and check if the 'foo' and 'bar' keys exist using offsetExists. We then access the 'baz' value using array notation. The package library for PHP Silex is the silex/silex package, which can be installed via Composer.