使用simpleHTMLDOM仅抓取特定的div类将抓取整个页面

Question

Hello Stackoverflow I'm trying to use the following library simplehtmldom.sourceforge.net

The purpose of this little script is to grab the StackOverflow Logo and echo it. But for some strange reason it grabs every DOM element instead. Any idea what i'm doing wrong here?

<?php
include('simple_html_dom.php');

$request_url = 'http://stackoverflow.com/';
$html = file_get_html($request_url);

$element = $html->find('div[id=hlogo]');

echo $html->save($element);

Thank you in advance for taking your time to read this!

Answer 1

$html->find returns an array in the form that you're using it, so you need to access the first element of the array to get the results:

include('simple_html_dom.php');

$html = file_get_html('http://stackoverflow.com');
$logo = $html->find('#hlogo'); // find the id hlogo

echo $logo[0];

# prints out
# <div id="hlogo"> <a href="/"> Stack Overflow </a> </div>

You're also using the save function wrong; from the docs:

// Dumps the internal DOM tree back into string 
$str = $html->save();

// Dumps the internal DOM tree back into a file 
$html->save('result.htm');

You're getting the whole page because $html contains the whole DOM!