[PHP] $this in an XML data handler ... in a class

[Clay Loveless]

Here's a brain-bender ... At least it is for me at the moment. : )

When I use an XML parser inside a class, the xml_*_handler functions aren't
recognizing "$this->" variables. I can kind of see why ... But would like it
to work anyway. : )

Here's an example:

class Blah
{
    var $xmlparser;
    var $current_element;

    // ...

    function _parseXML($data)
    {
        $this->xmlparser = xml_parser_create();
        xml_set_element_handler(
            $this->xmlparser,
            array($this,"_xml_start_element"),
            array($this,"_xml_end_element"));
        xml_set_character_data_handler(
            $this->xmlparser,
            array($this,"_xml_character_data"));
        xml_parse($this->xmlparser, $data);
        xml_parser_free($this->xmlparser);
    }

    function _xml_start_element($p, $e_name, $e_attributes)
    {
            $this->current_element = $e_name;
    }

    function _xml_end_element($p, $e_name)
    {
            // ...
    }

    function _xml_character_data($p, $data)
    {
        echo "element is: ".$this->current_element."\n";
        echo "data is: $data\n";
    }

} // end of class Blah



When this XML parser gets called from within the Blah class, the "element
is:" portion of _xml_character_data comes out blank!

This sort of makes sense, because the callback functions are "children" of
the xml_parser_create "parent" ... But should that make the children
ignorant of the "grandparent" variables referred to by $this->varname?

I hope this makes sense ... Has anyone else encountered this sort of
problem? I'm an old hat at PHP, but am relatively new to both XML parsing
and writing my own classes.

Thanks,
Clay


-- 
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php