Re: [PHP] loadXML() and namespace

Michael A. Peters wrote:
> It seems that if I use loadXML($string) and the $string has a namespace 
> defined in it, domdocument is nuking the namespace and changing the 
> nodenames from whatever to defaultwhatever.
> 
> Example -
> 
> <math xmlns="http://www.w3.org/1998/Math/MathML">
>   <mrow>
*snip*
>   </mrow>
> </math>
> 
> would get changed to
> 
> <defaultmath>
>   <defaultmrow>
*snip*
>   </defaultmrow>
> </defaultmath>
> 
> which of course breaks the page.

It seems to be related to the "xml" island concept of (x)html 5 where 
for compatibility with IE and MathType etc. an xmlns is declared as an 
attribute but a prefix isn't declared (IE no m:math).

To solve it, on the buffered string that gets imported I run:

function nsIsland($string) {
    $search[]  = "/<math\s([^xmlns]*)xmlns=[^\s>]*/";
    $replace[] = "<math $1";
    return preg_replace($search,$replace,$string);
    }

(I assume I may have to add a search/replace for svg) - then after 
import I look for math nodes and add the xmlns attribute back to them, 
and it seems to work.

A bit hackish, I'm guessing a future version of DOMDocument may take the 
html5 "xml island" into consideration, but this works now.