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php simple dom find all children

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Hi guys,

I am usingĀ this dom parser, and its pretty easy to find all links on a page then following the links to sub pages, but how do I know when to stop, i.e.when the page has no more children? I came across this script for dealing with child pages, but needless to say it outputs nothing:

$links = $html->find('div.layout');

    foreach ($links as $link) {
        foreach ($link->children() as $children) {
            if ($children->tag == 'a') {
                $output [] = $children->plaintext; //or whatever you want

How do I test for a link that has no more children?

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