+ throw exception is guids not appropriated to local site url

* basename extraction support multibyte strings filenames

src/Models/PostAttachment.php

@@ -1,7 +1,5 @@
 <?php namespace WpsMcloud\Models;
 
-use JetBrains\PhpStorm\Pure;
-
 class PostAttachment
 {
     const META_KEY_FLAGGED_AS_404 = '_wp_media_cloud_transform_404';
@@ -47,7 +45,7 @@ class PostAttachment
 
     public function getBasename(): string
     {
-        return basename($this->getUrl());
+        return mb_basename($this->getUrl());
     }
 
     public function getPostMimeType(): string
@@ -57,7 +55,6 @@ class PostAttachment
 
     public function setAttachmentMetaData(array $meta)
     {
-
         update_post_meta($this->getId(), self::META_KEY_ATTACHMENT_METADATA, $meta);
     }