Go through all the subpages in the folder, including multi-level investment. Find out which folder is not empty. Calculate the number of files in it. Files for monitoring: .pdf .png .jpg .jpeg .doc .docx .xls .xls .rtf .rar .zip . Write the way to a not empty folder and the number of files in it, each launch - a separate log. Forming a letter which will contain a log in a good human-readable format. Send through smtp.gmail.com to the indicated email.