Problems writing a large XML file using XMLWriter

[rgasch]

Hi,

 

I'm having a strange problem that I can't figure out. I'm trying to generate a large XML file using XMLWriter but the file I generate never grows beyond 3138986 bytes (whether I use the XMLWriter to write to a file/URI or generate the XML in memory and then  pass it though gzwrite() doesn't affect the outcome; the (gunzipped) file never grows beyond 3138986 bytes.

 

Here's some code excepts of what I'm doing:

 

$writer = new XMLWriter();

            if ($this->_gzip) {

                $writer->openMemory();

                $fp  = gzopen ($this->_filename.'.gz', 'wb');

            } else {

                $writer->openURI($this->_filename);

            }

 

        $writer->startDocument('1.0', 'ISO-8859-15');

        $writer->setIndent(4);

        $writer->startElement('Products');

 

        $count    = 0;

        $page    = 0;

        $objArray = new PNProductArray ();

        $colArray = getColumnsArray('table');

        do {

            $data = selectFromDB ('$page*$this->_pagesize, $this->_pagesize);

            foreach ($data as $dat) {

                $writer->startElement('Product');

                foreach ($colArray as $field) {

                    $writer->writeElement($field, $dat[$field]);

                }

                $writer->endElement();

                $count++;

            }

            $page++;

        } while ($data);

 

        $writer->endElement();

        $writer->endDocument();

 

        if ($this->_gzip) {

            $xml = $writer->outputMemory();

            $fp  = gzopen ($this->_filename.'.gz', 'wb');

            gzwrite ($fp, $xml);

            gzclose ($fp);

        } else {

            $writer->flush();

        }

 

In summary, no matter what I do, I can't seem to generate an XML file greater than 3138986 bytes. I've tried flushing the buffer after every DB fetch (if writing to a non-compressed file) but nothing helped. I'm not running into any (visible) PHP memory or processing time limits.

 

Any ideas would be much appreciated.

 

Thanks

Rob