I am checking uploaded file extension by pathinfo() function of php but in coding standard check it's shows

The use of function pathinfo() is discouraged

My code:

$fileExt = pathinfo($file, PATHINFO_EXTENSION);
  • Let me know if you have any issue Commented Sep 12, 2017 at 18:40

3 Answers 3


You can use Magento\Framework\Filesystem\Io\File instead.



namespace Vendor\ModuleName\Model;

use Magento\Framework\Filesystem\Io\File;

class MyClass
    * @var File
   private $file;

    * @param File $file
   public function __construct(File $file)
       $this->file = $file;

   public function myMethod()
       $path = 'this\is\some\dummy\path\potato.jpg';
       $pathInfo = $this->file->getPathInfo($path);
  • This doesn't allow for the PATHINFO_EXTENSION option as a second parameter however. Commented Dec 3, 2019 at 18:42
  • this will return an array, you can access the extension using key extension
    – Mujahidh
    Commented May 3, 2023 at 11:43

Use \Magento\MediaStorage\Model\File\UploaderFactory for file operation You can get file extension by this code:

$uploader = $this->fileUploaderFactory->create(['fileId' => $scope]);

if ($uploader->save($this->getBaseDir())) {
    echo $fileName = $uploader->getUploadedFileName();
    echo $fileExt = $uploader->getFileExtension();

I think I've found the best way to achieve that, you'll get file extension from this code:

        $pathArray = explode('.', $path);
        $extension = end($pathArray);
        return $extension;

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