“＆lang”在URL中被误解释

Question

I am developing for javascript disabled phones. My code looks like this

<a href="someurl?var=a&lang=english">Link 1</a>
<a href="someurl?lang=english&var=a">Link 2</a>

But the browser interprets the URL as -

someurl?var=a%e2%8c%a9=english         (Link 1, incorrect)
someurl?lang=english&var=a             (Link 2 works just fine !)

It seems like &lang=english is being converted to a%e2%8c%a9=english

Could someone explain why this is happening?

Answer 1

In HTML, the & character represents the start of a character reference.

If you try to specify an invalid character reference, then browsers will perform error recovery and treat it as an ampersand instead.

From the HTML DTD:

<!ENTITY lang     CDATA "&#9001;" -- left-pointing angle bracket = bra,
                                 U+2329 ISOtech -->

… so &lang is not an invalid character reference.

To include an ampersand character as data, use the character reference for an ampersand: &