Simple HTML DOM Parser error

Question

I'm using the PHP Simple HTML DOM Parser to get e-mail addresses from 10.000+ pages.

require_once('simple_html_dom.php'); 
$html = file_get_html('http://www.myurl');
$email = $html->find('dl', 5)->children(3);

Sometimes get the follow error. Probably because some page's don't have the tag:

Fatal error: Call to a member function children() on a non-object

How to avoid this error if a page doesn't contain the info I'm looking for without interrupting the complete script?

The find() failed to locate anything, so what it returns has no ->children() method. — Marc B
– Marc B, Commented Jul 5, 2013 at 21:57

pulsar · Accepted Answer · 2013-07-05 21:57:26Z

2

You could test to see if $email is an object by using the is_object() function, e.g.

$email = $html->find('dl', 5);
if(is_object($email) === true)
{
    print_r($email->children(3));
}
else continue;

This would probably be quicker than testing for children using an external library since it uses a function already present in the PHP engine.

answered Jul 5, 2013 at 21:57

pulsar

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Comments

Rob W · Accepted Answer · 2013-07-05 21:02:41Z

2

Don't chain your methods if there's uncertainty. Assign $email = $html->find('dl', 5) - then test if there are any children, probably with hasChildNodes

answered Jul 5, 2013 at 21:02

Rob W

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