从Xpath查询中选择单个节点

Question

I'm using this code to extract all required nodes from xml:

$xml = simplexml_load_file('file.xml');

    echo "<strong>Using direct method...</strong><br />";
    $items = $xml->xpath('/w:document/w:body/w:tbl/w:tr/w:tc/w:p/w:r/w:t');
    foreach($items as $item) {
        echo "Found $item<br />";
    }

I'm getting a long list of entries, but I need possibility to choose any of them seperately. tried to use echo "Found $item[2]<br />"; but got error:

Warning: main() [function.main]: Cannot add element t number 1 when only 0 such elements existthanks for advices

Answer 1

If you want to extract the 2nd w:t element use the index in xpath instead.

$item = list($xml->xpath('(/w:document/w:body/w:tbl/w:tr/w:tc/w:p/w:r/w:t)[3]'));

Note 3 means 3rd w:t element. Xpath Index starts from 1 instead of 0. And list is used to fetch the first element as Xpath always returns an array.

Also note this XPath can be reduced to (//w:r/w:t)[3]unless same tree is available somewhere else. So it looks like

$item = list($xml->xpath('(//w:r/w:t)[3]'));