PHP script to transfer small files from our basic site to an SFTP server

THE PROJECT: We need a PHP script to transfer a short list of small files from our GoDaddy folder to our e-commerce SFTP folder on another server. More detail: We use a PHP script to scrape some sites each day to get warehouse inventory quantities. We activate them via cron job. Works great. The resulting files are stored in a folder on our server. This is the SOURCE server. We need these few very small (less than 8KB each) files to be transferred (also via cron job) to our e-commerce site. The e-commerce site only has SFTP transfer functionality. After the files arrive in the e-commerce site's folder, the files are processed automatically into the product database. This is the DESTINATION server. SOURCE server is a GoDaddy shared server. Deluxe Linux Hosting. PHP 5.6 It has SSH. The PHP script must be placed here. DESTINATION server is our e-commerce server. It can only be accessed via SFTP with our username/password. This server cannot run any scripts (has no PHP capability). *** If we have missed any important detail needed to bid, please ask. We'll respond as soon as possible and edit the project description, if necessary.