// Open a ZIP archive $zip = new PclZip('archive.zip'); // Extract all files in the archive $result = $zip->extract(PCLZIP_OPT_PATH, 'extracted/'); if ($result == 0) { $error = $zip->errorInfo(); echo "Error: {$error[2]} (code {$error[0]})"; } // Add a new file to the archive $result = $zip->add('newfile.txt'); if ($result == 0) { $error = $zip->errorInfo(); echo "Error: {$error[2]} (code {$error[0]})"; }In the first example, we are trying to extract all files in the archive to a new directory. If any errors occur, we use `errorInfo` to retrieve the error message and code. In the second example, we are trying to add a new file to the archive. Again, if any errors occur, we use `errorInfo`. Based on the syntax and usage, the package library is likely the PclZip extension for PHP.