: The native and free utility for this format. You can download it from the official 7-Zip website .

To access the contents of this file, you cannot open it alone. You must follow these steps:

: To extract a multi-volume archive via command line, you only point the command at the first file (the .001 file), and the utility handles the rest.

: PHP's ZipArchive class is for .zip files and does not natively support the .7z format.

: You need all other numbered parts of the archive (e.g., PHP.7z.001 , PHP.7z.002 , etc.) in the same folder.

: Always open or extract only the file ending in .001 . Modern extraction tools will automatically detect and join the subsequent parts like .003 to reconstruct the full data. Recommended Tools :