When uploading product image i get "upload HTTP error"

Question

When I want to upload product image I get an error:

upload HTTP error

Answer 1

If you are using PHP 7 then go to

lib/Varien/File/Uploader.php

Find the following code

$params['object']->$params['method']($this->_file['tmp_name']);

And replace it with

$params['object']->{$params['method']}($this->_file['tmp_name']);

Answer 2

I found the solution. On server there wasn't activated gd php extension. I activated it and upload is now working. I hope someone would find this usefull.