Get a Image file path (src) on Drupal 8/9

Get the image file src (url)   

    $fid = 1;//The file ID   

    $file = \Drupal\file\Entity\File::load($fid);

    $path = $file->getFileUri();

    $url = $file->createFileUrl();

    OR

    $path = 'public://images/image.jpg';

    $url = \Drupal\image\Entity\ImageStyle::load('medium')->buildUrl($path);

Get default file path (get original file path)

$url = file_create_url($path);

OR

$url = $file->createFileUrl();

Get internal path (Server side)

$image_path = drupal_realpath($path);

Get an image style path

Example : Image style : 'medium'

$fid = 1; // The image file ID.

$file = \Drupal\file\Entity\File::load($fid);

$path = $file->getFileUri();

$image_url = \Drupal\image\Entity\ImageStyle::load($style_name)->buildUrl($path);

Get relative path

$image_style = \Drupal\image\Entity\ImageStyle::load('large');

$image_uri = $imageFile->getFileUri();

$url = $image_style ? $image_style->buildUrl($image_uri) : file_create_url($image_uri);

$url = file_url_transform_relative($url);