When should I use GET or POST method? What's the difference between them?

Question

What\'s the difference when using GET or POST method? Which one is more secure? What are (dis)advantages of each of them?

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Answer 1

This W3C document explains the use of HTTP GET and POST.

I think it is an authoritative source.

The summary is (section 1.3 of the document):

• Use GET if the interaction is more like a question (i.e., it is a safe operation such as a query, read operation, or lookup).
• Use POST if:
  • The interaction is more like an order, or
  • The interaction changes the state of the resource in a way that the user would perceive (e.g., a subscription to a service), or
  • The user be held accountable for the results of the interaction.