php script - zip files

Create a script in php to be run in a dayly cronjob that will go through the main folder and subfolders. For each file verify the name and the date of the file IF ( the file name is in the pattern bd_log_*.txt ) AND ( the date of the file is older than today ) THEn compact in zip format and store the zip file in the same folder of the txt and delete the original txt file. For testing purpose, you can use the attached zip file that has a folder tree with files. your script should NOT change the following files file extension different that txt starting different than bd_log_, for instace, the file [login to view URL] you will need to upload your code to bitbucket.