public static PublicStream::baseUrl()
Finds and returns the base URL for public://.
Defaults to the current site's base URL plus directory path.
Note that this static method is used by \Drupal\system\Form\FileSystemForm so you should alter that form or substitute a different form if you change the class providing the stream_wrapper.public service.
string The external base URL for public://
public static function baseUrl() { $settings_base_url = Settings::get('file_public_base_url', ''); if ($settings_base_url) { return (string) $settings_base_url; } else { return $GLOBALS['base_url'] . '/' . static::basePath(); } }
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https://api.drupal.org/api/drupal/core!lib!Drupal!Core!StreamWrapper!PublicStream.php/function/PublicStream::baseUrl/8.1.x