If you want to create a text document that lists everything inside the .zip :

You can use the "Print" menu and select a "Generic/Text" printer to save the file list as a .txt file .

If you received this file in a text message or email claiming to be from DHL , please be cautious. Official DHL fraud awareness guidelines state they typically only request payments for customs via secure links and rarely send unsolicited .zip attachments, which are often used to spread malware.

KB WinZip: How to print the list of files in a Zip file to a text file

If there is already a .txt file inside the archive, you can extract it:

You can use ZipArchive to read a specific entry like a Readme.txt into a string.