Can We use Array Element in DomDocument and nesting xpath?

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 ...

The reason it's failing is this: @$dom2->loadHTML($page_data[]);

[] can only be used for assignment, not reading. You need to actually 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);

}

What's still unclear to me is how exactly there is any nesting going on here; you're not nesting anything, you are just iterating over an array.