According to kowledge base the maximum file size of the servers is 10Mb for which I couldn’t upload my project compressed in zip file. Then I used the best compression of rar to reduce the size of the archive to ~ 8Mb. The file transferred successfully with Monster FTP(for the former file i.e. the ~20Mb one, showed 413 error) but after reloading the page the file doesn’t appear. The same thing happened uploading with fileZilla.
Additional information:
I wanted to extract the rar file using unzipper.php that can extract zip, rar, tar.gz archives located at the same directory where it is.
.rar files are blocked entirely, so that’s why you can’t upload them.
If you need to upload an archive, the best way to do so is to use a desktop FTP client like FileZilla, extract the archive on your own computer and upload the extracted files instead.
Even if you’re able to upload the compressed archive, trying to run the unzip script might cause problems with PHP time limits. You’re welcome to try to make it work, but I cannot recommend attempting any method to extract archives on the server.