Before
After
file_create_url($uri)
\Drupal::service('file_url_generator')->generateAbsoluteString($uri)
drupal_get_path('module', 'node')
\Drupal::service('extension.list.module')->getPath('node')
drupal_get_path('theme', 'seven')
\Drupal::service('extension.list.theme')->getPath('seven')
drupal_get_filename('module', 'node')
\Drupal::service('extension.list.module')->getPathname('node')
drupal_get_filename('theme', 'seven')
\Drupal::service('extension.list.theme')->getPathname('seven')
drupal_get_filename('theme', 'seven')
\Drupal::service('extension.list.theme')->getPathname('seven')