Question

I’m writing a program that utilises a page’s source code, however in certain instances I want to ignore parts of it. Ultimately I want to remove the tag which has id navigation and all of its contents, and then output the HTML.

Editted code:

<?php
$lol = new DOMDocument();
$fh = fopen("test.txt", "r");

$lol->loadHTML(fread($fh, filesize("test.txt")));
$lol->saveHTML();

 $xpath = new DOMXpath($lol);
 $nodeList = $xpath->query('//navigation');
 foreach ($nodeList as $element) {
    $element->parentNode->removeChild($element);
 }

/*
foreach($divs AS $div) {
    if($div->getAttribute('id') == "navigation") {
        $lol->removeChild($div);
    }
}
*/


$out = $lol->saveHTML();

echo $out;
?>

From what I’ve read online I would have expected this to work, but doesn’t.

Any suggestions appreciated.

test.txt is just a text file with source code of the page it.

Answer 1

It looks like the comments have got you most of the way there. It just looks like the XPath needs a little tweaking. $xpath->query('//navigation') will search for <navigation> tags, while you are looking for tags with the id navigation:

 $xpath = new DOMXpath($lol);
 $nodeList = $xpath->query("//*[@id='navigation']");
 foreach ($nodeList as $element) {
    $element->parentNode->removeChild($element);
 }

XPath is pretty powerful for this sort of thing, this W3 tutorial is a good place to start learning some more.

(if that doesn’t work I’ll echo the calls to post the relevant HTML).