Re: Root[1] vs Root (2)

[Branko N. <bra...@in...>]

Works!

Thank you!
Branko

Nigel Swinson wrote:

>Ah thanks...
>
>Code read:
>
>   if (sizeOf($xPathSet) !== 1) {
>    return FALSE;
>   }
>   $baseXPath = $xPathSet[>>>1<<<];
>
>And should have read
>
>   if (sizeOf($xPathSet) !== 1) {
>    return FALSE;
>   }
>   $baseXPath = $xPathSet[0];
>
>Silly off by one error.
>
>Should hopefully work now.  If not please send .xml and .php so that I can
>quickly run here and fix.
>
>Cheers
>
>Nigel
>
>===========================
>For the most recent version of Php.XPath, and an archive of this list visit:
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>----- Original Message -----
>From: "Branko Namestnik" <bra...@in...>
>To: <php...@li...>
>Sent: Tuesday, August 06, 2002 11:12 PM
>Subject: Re: Root[1] vs Root (2)
>
>
>  
>
>>Thank you for nice explanation, Nigel. I'm also very thankful fur code
>>modification.
>>Unfortunately my test shows error. After downloading the latest XPath
>>from CVS, I tried to use
>>
>>$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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