Can We use Array Element in DomDocument and nesting xpath?

Question

I am using the following code

    $page_data=array();//$title_links is array having urls
     $nodearr=array();
    foreach ($title_links as $b_url)
    {
        $page_data[]= mycurl($b_url);//my curl function, it is okay

        $dom2 = new DOMDocument();//creating new domdocument object inside a domdocument object
        @$dom2->loadHTML($page_data[]); 
        $xpath_cat = new DOMXPath($dom2);//same as domdocument , nesting xpath
        $nodelist = $xpath_cat->query('//span[@class="zg_hrsr_ladder"]', $dom2);
//echo nodeslist;

foreach ($nodelist as $node) {
   $nodearr[] = $node->textContent;
 }


    }

so the scenerio is ,

I am nesting a 'domdocument' inside an other 'DomDocument'
using 'foreach loop', i am inserting Array Element in DomDocument
aslo, as i am nestind domdocument inside domdocument , so i am declaring new xpath query

The Question is ...

Doing so is okay? Is it a acceptable Programming technique?

Pros and Cons?

Any ALternative to it?

Clarification:
$title_links is obtained using curl, it is urls extracted from web page using domdocument and xpath query.
so $title_links is at first level of xpath and domdocument, and $nodelist is at the 2nd level of nesting od xpath and dom-document

What exactly is the end goal? And how are you nesting DOMDocuments exactly - are you extending that class and this is code one of the methods of your extension? — prodigitalson, Feb 05 '12 at 20:58
No, I am not using OOP or classes in the code, its simple php code, and the final thing, what i have is, i want to run xpath query on the pages brought by "mycurl()", failing in running the query. So i decided to make the concept clear before proceding further — Zaffar Saffee, Feb 05 '12 at 21:01
unfortunately, neither concept nor scenario is clear to me. Why are you using cURL to fetch the URLs, instead of http://php.net/manual/en/domdocument.loadhtmlfile.php? And what do you mean by nesting XPath? The code above is not helping to illustrate your goals. If you want to query multiple documents, do it one document at a time. — Gordon, Feb 05 '12 at 23:20

score 0 · Accepted Answer · answered Feb 06 '12 at 01:37

Your reason its failing is this: @$dom2->loadHTML($page_data[]);

[] can only be used for assignment, not reading. You need to actullay have a key you can reference. I would probably do it like this:

$page_data=array();//$title_links is array having urls
foreach ($title_links as $key => $b_url)
{
    $page_data[$key]= mycurl($b_url);//my curl function, it is okay

    $dom2 = new DOMDocument();
    $dom2->loadHTML($page_data[$key]); // error suppression is evil!
    $xpath_cat = new DOMXPath($dom2);

}

Whats still unclear to me is how exactly there is any nesting going on here, youre not nesting anything you are just iterating over an array.

Can We use Array Element in DomDocument and nesting xpath?

1 Answers1