A script created for my system administration course professor, Ahmad Esmaili @ Stony Brook University.
This simple powershell script will unzip all .zip files in a given directory to another directory. Includes support for the following formats.
ZipFile>Folder>Files/Folders
ZipFile>Files/Folders
It will then forcibly remove any files/folders that do not have the extension: *.html *.css
Lines 2, 3, 37 & 41 are paths for your source/destination files
Delete lines 37-42 if you do not need the second portion of the functionality, forcibly removing files/folders without the proper extension.
Modify line 38 to whatever extensions you wish to delete.