Re: Root[1] vs Root (2)

[Nigel S. <nig...@us...>]

Ah thanks...

Code read:

   if (sizeOf($xPathSet) !== 1) {
    return FALSE;
   }
   $baseXPath = $xPathSet[>>>1<<<];

And should have read

   if (sizeOf($xPathSet) !== 1) {
    return FALSE;
   }
   $baseXPath = $xPathSet[0];

Silly off by one error.

Should hopefully work now.  If not please send .xml and .php so that I can
quickly run here and fix.

Cheers

Nigel

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----- Original Message -----
From: "Branko Namestnik" <bra...@in...>
To: <php...@li...>
Sent: Tuesday, August 06, 2002 11:12 PM
Subject: Re: Root[1] vs Root (2)


> Thank you for nice explanation, Nigel. I'm also very thankful fur code
> modification.
> Unfortunately my test shows error. After downloading the latest XPath
> from CVS, I tried to use
>
> $set  =  $x1->match("//document", "/root/folder[3]");
>
> but results have been from whole document, not only from folder[3],
> with php error *"Notice*: Undefined offset: 1 in *XPath.class.php* on
> line *2126"*.
>
> Cheers,
> Branko
>
>
> Nigel Swinson wrote:
>
> >>>I've noticed that root absolute path need to be numbered as root[1]:
> >>>   $set  =  $x1->match("//document", "/root[1]/folder[3]");
> >>>
> >>>In case without [1] after root
> >>>   $set  =  $x1->match("//document", "/root/folder[3]");
> >>>have got error:
> >>>*XPath error in XPath.class.php:2121* The supplied xPath '//document'
> >>>does not *uniquely* describe a node in the xml document.
> >>>
> >>>Seems strange to me, as root is always the only one.
> >>>
> >>>
> >
> >Wherever the class takes an xPathQuery, you can miss out the [] if there
is
> >only one relevant node, but where the class takes an absoluteXPath, that
> >particular argument isn't "pre evaluated" so you have to provide an
> >absoluteXPath. "/root" isn't a node in the document, but "/root[1]" is.
> >"/root" is an XPath expression (an xPathQuery) that evaluates to
precisely
> >one node it so happens, so what we can do is to evaluate() on the /root,
> >then check that it returns only one node.
> >
> >Your code will be faster if you supply the [] though, as it means that
the
> >class does not needlessly have to evaluate the /root XPath expression
only
> >to find out that there is only one root node.
> >
> >Never-the-less to make the class easier to use, I've upgraded the second
> >parameter of match() for you to an xPathQuery rathar than an
absoluteXPath,
> >and demand that the xPathQuery evaluate to a single node.
> >
> >Cheers
> >
> >Nigel
> >
> >
> >
>
>
>
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