Does URL querystring encoding preserve order for multi-valued keys?

Question

http://www.example.com?a=1&a=2 has a valid form-urlencoded querystring and has two values (1 and 2) for the key a.

Is there any spec or standard for URL consumers guaranteeing ordering (or lack thereof) of parsed values?
Do common implementations (Django's QueryDict, dojo's queryToObject, PHP, etc) preserve ordering?

Community · Accepted Answer · 2017-05-23 11:49:11Z

2

OK, this question: Authoritative position of duplicate HTTP GET query keys, suggests there is no such standard and that order should not be considered reliable.

My experience has been that latest WebKit encodes identically named form fields in DOM order and that Django's QueryDict preserves that order. Shaky ground at best.

edited May 23, 2017 at 11:49

CommunityBot

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answered Jun 13, 2012 at 18:54

hurrymaplelad

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