html - PHP's DomXPath not working the way it was expected -


i'm trying parse html page: http://www.valor.com.br/valor-data/moedas

for simple start, i'm trying td elements class="left" , echoing inner texts. i'm struggling understand why code:

    $finder = new domxpath($dom);     $tds = $finder->query("//*[@class='left']");     foreach ($tds $td) {         echo $td->textcontent;     }

gives me expected output (a bunch of words belong td elements aren't worth pasting here) while this:

    $finder = new domxpath($dom);     $tds = $finder->query("//td[@class='left']");     foreach ($tds $td) {         echo $td->textcontent;     }

finds nothing. i've tried $finder->query("//td") td elements, it's domxpath doesn't recognize tag names. has ever faced same problem?

i have not tested, namespace issue. input page xhtml , has correctly declared xhtml namespace. therefore, need register namespace prefix , use prefix in query.

something this

$finder = new domxpath($dom); $finder->registernamespace("x", "http://www.w3.org/1999/xhtml"); $tds = $finder->query("//x:td[@class='left']"); foreach ($tds $td) {     echo $td->textcontent; }

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