Just a little advice on how i can achieve this...
Basically i am building an admin panel for my sisters business website which is easy enough.
I am wanting to post a message every now and then to people i have built a website for.
I would like to be able to input the message on my websites admin panel and it to show up on other peoples website admin panels
"Your website will be down for 1 hour while upgrade to server is being made".
I was told rss is the best, but i do not know anything about rss as i am new to web development and php.
Has anyone any ideas how i can achieve this.