$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:
$name = utf_encode('"Home"');Using the expression throws the "Invalid Predicate" Error.
On 2005-03-16 12:06:24 -0500, jason.barnett@xxxxxxxxxxxxx (Jason Barnett) said:
C Drozdowski wrote: ...$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.
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