Download PHP - Website Online Packaging Tool
Download and unzip, get package.php, put it in the same directory using FTP to upload files to be compressed (typically root of the site).
Open the page in a browser, enter the password (authentication password in the page prompted), selected to compress files or directories (including subdirectories), click on the "Compress" button to start compression.
After the extraction is complete, the file is automatically generated package download link address, click to download.
When using this script, have written to the web root file permissions, otherwise an error during compression.
After use, I recommended to remove the PHP script in time to avoid malicious use.