Symfony2 / File Upload - guessExtension on null if file field is empty

Question

I have file field with required = false, multiple=multiple. Everything works fine, but if file input is empty, symfony2 show me this error.

Error: Call to a member function guessExtension() on null

Here is my form type:

->add('file', 'file', array(
                'multiple' => 'multiple',
                'data_class' => null,
                'required' => false,
                'mapped' => false,
                'attr' => array(
                    'maxSize' => '1024k',
                    'accept' => 'image/*',
                )
            ))

Upload function:

private function uploadImg($files)
    {
        $path = array();
        foreach ($files as $file) {
            $extension = $file->guessExtension();
            if (!$extension) {
                $extension = 'bin';
            }
            $randomName = 'image' . date('Y-m-d-H-i-s') . uniqid() . '.' . $extension;
            $file->move('uploads/images/', $randomName);
            $path[] = $randomName;
        }
        return $path;
    }

How can I check if file input is empty?

$form['file']->getData(); every time returns Array

You can try with count. Since multiple is set to true you will always end up receiving an array, whether it's empty or not. — Artamiel
– Artamiel, Commented Aug 23, 2015 at 19:01
Thanks, but it works only if input is totally empty or has 2 or more files. — user3703456
– user3703456, Commented Aug 23, 2015 at 19:11

FuzzyTree · Accepted Answer · 2015-08-23 19:12:31Z

1

You can use continue to skip empty files

    foreach ($files as $file) {
        if(!$file) {
            continue; //skip
        }

        $extension = $file->guessExtension();
        if (!$extension) {
            $extension = 'bin';
        }
        $randomName = 'image' . date('Y-m-d-H-i-s') . uniqid() . '.' . $extension;
        $file->move('uploads/images/', $randomName);
        $path[] = $randomName;
    }

answered Aug 23, 2015 at 19:12

FuzzyTree

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Comments

Muhammad Shahzad · Accepted Answer · 2017-06-07 17:15:08Z

0

For Symfony 3, I used this method and working fine.

use Symfony\Component\HttpFoundation\File\UploadedFile;

public function updateAction(...){
  // $image is Entity property, change accordingly.
  $file = $item->getImage();
  if ($file instanceof UploadedFile) {
     ... upload code
  }
}

answered Jun 7, 2017 at 17:15

Muhammad Shahzad

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