PHP DOMDocument：如何选择特定标记下的所有链接

Question

I'm just getting started with using php DOMDocument and am having a little trouble. How would I select all link nodes under a specific node lets say

in jquery i could simply do.. $('h5 > a') and this would give me all the links under h5.

how would i do this in php using DOMDocument methods? I tried using phpquery but for some reason it can't read the html page i'm trying to parse.

Answer 1

As far as I know, jQuery rewrites the selector queries to XPath. Any node jQuery can select, XPath also can.

h5 > a means select any a node for which the direct parent node is h5. This can easily be translated to a XPath query: //h5/a.

So, using DOMDocument:

$dom = new DOMDocument;
$dom->loadHTML($html);

$xpath = new DOMXPath($dom);
$nodes = $xpath->query('//h5/a');

foreach ($nodes as $node) {
   // do stuff
}