How RSS feed submitter softwares are able to submit feeds?

Well, recently i bought a software that submits RSS to various RSS directories. Some of the directories, when 开发者_StackOverflow中文版we visit manually through a internet browser, requires registrations to submit our feed (Most popular example of such directories is feedage dot com) What made me wonder is, the software don't ask any login details while submitting my feed to 'feedage'!!! Now, what i'd like to know is, how the software is able to submit my feed to feedage without loggin in ??

if i can get the procedure then i'm planning to code a php script that will do the work for me from my server using cron job

Usually websites like these have APIs, what this means is that the software can submit the feed in a way especially designed for the software. However, if you want to be sure, you should ask either the developer you bought the software from or feedage directly.

Feedage.com doesn't have anything to block scripts from using it (no captcha), so you could write a program or script to access the page.

You should do some research on cURL (http://php.net/manual/en/book.curl.php). You could use it to send data to the website with a PHP script.