Simplehtmldom get first element

Question

When I parse some html and get an array of html elements I want to get the first item. Here is the code:

    $url  = getLink($good);
    $html = file_get_html($url);

    $offers = array_filter($html->find('div.b-offers'), function($node) {
        return $node->class == 'b-offers'; // If this only class is set
    });

    // $offer    = $offers[0];  // <---- look here
    foreach ($offers as $offer) {
        $price    = $offer->find('span.b-prices__num', 0)->innertext();
        break;
    }

It works only if I use foreach and the break immediately. But why $offer = $offers[0] doesnt work? If I write this way there will be an error here:

$price = $offer->find('span.b-prices__num', 0)->innertext();

Like call find() function on a non-object.

Also another question is: is it possible to rewrite the code where I use array_filter function to get an element which has only one class "b-offers"? I remember I tried some different approaches like

$html->find('div[class="b-offers"]')

or kind of, but it didn't work for me

Answer 1

$offer = $offers[0]; doesn't work because array_filter doesn't return a 0-index based array. it preserves the key of the previous array.

Answer 2

why $offer = $offers[0] doesnt work? I think because at this point $offers is still an object and not an array

to get an element which has only one class "b-offers" try $html->find('div.b-offers');