On ampersands in query strings (was: HTML entities in URLs and urlencoding)
pagaltzis at gmx.de
Tue Apr 1 00:45:42 EDT 2008
* Waylan Limberg <waylan at gmail.com> [2008-04-01 03:50]:
> As far as I can tell, the "&" breaks the query string.
No, it doesn’t, as you found out.
However, on a tangential note: if you write web apps, *please*
make sure that you support the semicolon as a query parameter
separator as well as the ampersand:
More importantly, please **please** make sure that the URIs your
code generates use semicolons rather than ampersands. Semicolons
need not be escaped in HTML and XML, which makes copy-pasting
users much less likely to produce invalid markup regardless of
the context they’re working in.
Even though this W3C recommendation is over a decade old, use of
ampersands in query strings persists. (In fact, PHP not only does
not emit URIs with semicolon-separated query strings, by default
it cannot even parse them! You need to set an unbreak-me config
option to make it recognise the semicolon.)
Aristotle Pagaltzis // <http://plasmasturm.org/>
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