Which PHP method(s) can be used to send form data that is persistent across succeeding page views (such as for a language selection feature) in WordPress?

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Which PHP method(s) can be used to send form data that is persistent across succeeding page views (such as for a language selection feature) in WordPress?
Answers:
1.      POST
2.      GET
3.      SESSION or COOKIE

4.      POST or GET
GA
Gaurav Arora, Digital Media Lead. 10+ years running paid media and tracking for brands in the USA, UK and Canada.