Override getExtension() method, parse the extension by client file name

Author: huangzhhui

src/Upload/UploadedFile.php

@@ -81,6 +81,14 @@ public function __construct(
  ->setClientFilename($clientFilename)
  ->setClientMediaType($clientMediaType);
  $this->isOk() && $this->setFile($tmpFile);
+ parent::__construct($tmpFile);
+ }
+
+ public function getExtension(): ?string
+ {
+ $clientName = $this->getClientFilename();
+ $segments = explode('.', $clientName);
+ return end($segments) ?? null;
  }
 
  /**