Remote command unzip

Is it possible to unzip a file on server side with ftp?
In winscp the "remote command" options are gray

 

As Till already said it, either SSH/SFTP or alternatively you could write a PHP file that unpacks your file when you open it via the browser.

 

The tip of the php way works great.

For everybody who want to do it also, here the code
Make a unzip.php file with the code below in it. Place the file in the directory where you want to unzip it and run the file in your browser. Thats all.

PHP:

<?php

// assuming file.zip is in the same directory as the executing script.
$file = 'file.zip';

// get the absolute path to $file
$path = pathinfo(realpath($file), PATHINFO_DIRNAME);

$zip = new ZipArchive;
$res = $zip->open($file);
if ($res === TRUE) {
  // extract it to the path we determined above
  $zip->extractTo($path);
  $zip->close();
  echo "WOOT! $file extracted to $path";
} else {
  echo "Doh! I couldn't open $file";
}
?>