|
|
Posted by C Drozdowski on 03/16/05 23:48
It's just a coincidence that I used xml:id as part of my query
expression. If I use following code method to build my expression:
$query = '//book/chapter[section="' . $section . '"]';
or say
$query = '//book/chapter[@title="' . $title . '"]';
I get an "Invalid Predicate..." error when either the $section or
$title variable contains a double quote.
However, here's an example:
XML:
<?xml version="1.0" encoding="UTF-8"?>
<table>
<row>
<mod_id>home</mod_id>
<mod_access>1</mod_access>
<mod_name>"Home"</mod_name>
</row>
</table>
XPath Expression:
$query = '//table/row[mod_name="' . $name . '"]';
Variable Assignment:
$name = utf_encode('"Home"');
Using the expression throws the "Invalid Predicate" Error.
On 2005-03-16 12:06:24 -0500, jason.barnett@telesuite.com (Jason Barnett) said:
>
> C Drozdowski wrote:
> ...
>> $query = '//book/chapter' . '[@xml:id="' . $id . '"]';
>
> First of all check the XPath documentation:
>
> http://www.w3.org/TR/xpath
> http://www.w3.org/TR/xpath#path-abbrev
>
> AFAIK your expression above is the way to build this query. Give us a
> link to the XML doc if you want us to take a look at that specific doc.
> Also make sure you referenced the correct DTD. And (just to be sure)
> try to validate you document against the DTD.
>
>>
>> Given this expression, if $id contains one or more single quotes, an
>> error is thrown.
>>
>> $query = "//book/chapter[@xml:id='$id']";
>>
>> I need to be able to build an exression that contains either double or
>> single quotes in the search regarding of how I programatically build the
>> expression.
>>
>
> A couple of things that may be in play here...
>
> - First of all I recall there was a specific bug with xml:id, although I
> can't recall off the top of my head what it was...
> - Secondly the XPath querying interface in PHP will only return simple
> data at this point. In fact, I think it will only return strings.
>
> http://www.w3.org/TR/xpath#attribute-nodes
>
> But if your ID is simple data (integer / string), I can't imagine it
> would be a problem for XPath to return it.
[Back to original message]
|