Choosing between POST and GET

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GET vs. POST (form processing)
When do you use POST and when do you use GET?

I'm interested in POST and GET. Why do I exactly need them and what is the difference between them? I know they both retrieve some data from some url, but that's probably all I know.

Start here: http://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html#sec9.3 - they are one of the basic tools for accessing the web; in a very simplified shortcut: one is supposed to read webpages, the other is supposed to send data to webpages. — Piskvor left the building, Apr 27 '11 at 10:04
they are HTTP methods and POST - posts and GET - gets data ... — Selvin, Apr 27 '11 at 10:05
See http://stackoverflow.com/questions/4668701/get-vs-post-form-processing for a basic overview. — Michael, Apr 27 '11 at 10:06

score 1 · Answer 1 · answered Apr 27 '11 at 11:05

GET is purely for retrieval. One of the most important aspects of GET is that GET is never allowed to change the state of the server (meaning: modifications).

POST does allow that.

This distinction is incredibly important. So if you're fetching info based on a couple of parameters/filters/etc. GET will do fine, but as soon as you're modifying anything on the server you MUST use POST.

Choosing between POST and GET

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