How to make navigation buttons Previous, Next article?

Question

1C-Bitrix

We have an infoblock with sections in each section of the article. It is necessary to make the navigation buttons Previous, Next article in the detailed view of the Article.

Answer 1

function getNeighboringItems ($elementId, $sort = [], $filter = [])
  {
    Loader::includeModule('iblock');

    $arrows = [];

    $elements = CIBlockElement::GetList($sort, $filter, false, ['nElementID' => $elementId, 'nPageSize' => 1], ['ID', 'NAME', 'DETAIL_PAGE_URL']);

    while ($element = $elements->GetNext())
      $arrows[] = $element;

    $result = ['LEFT' => [], 'RIGHT' => []];

    if (count($arrows) == 3)
    {
      $result['LEFT'] = $arrows[0];
      $result['RIGHT'] = $arrows[2];
    }
    elseif (count($arrows) == 2)
    {
      if ($arrows[0]['ID'] != $elementId)
        $result['LEFT'] = $arrows[0];
      if ($arrows[1]['ID'] != $elementId)
        $result['RIGHT'] = $arrows[1];
    }

    return $result;
  }