Saving web data

So a hopefully simple question for you guys. I want to make a website capable of saving typed in text. Strictly speaking the page has several text boxes where i can type in text press a save button(or autosave) and when i visit the site again a day/week/year later the text is still there. ive heard you can do this with PHP but i am a bit at a loss of how its done.

i´m aware of localStorage but i wish to save the data server side

If someone knows how to do this and is willing to type up an example i would really appreciate it.

PS i have my own domain and i will be the only one using the site.