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<?
    $extract_dir = "./sprites/";
    $extract_file = "sprites.zip";
    $zip = new ZipArchive;
    $res = $zip->open($extract_file);
    if ($res === TRUE) {
    $zip->extractTo($extract_dir);
    $zip->close();
    echo "OK";
    } else {
    echo "NOK";
    }

?>