PHP Simple HTML DOM Parser. Why can't I get the item?

Question

PHP

Good day!
First time writing a parser.
You need to parse such a Page of oils, or rather the information that is in the table.
I googled it and decided to use the PHP Simple HTML DOM Parser.
Partially succeeded. I can not understand, only how can I get the elements that are shown in the screenshot:

My code:

<?php
include 'simple_html_dom.php';

$link = 'http://lubematch.shell.com/ru/ru/equipment/100_2_8i_avant_001755';

   $data = file_get_html($link);

   $result = array();

        foreach($data->find('td.application') as $a){

          $result['application'][] =  $a->plaintext;

        }

        foreach($data->find('td.recommendation') as $a){

            $result['recommendation'][] =  $a->plaintext;
        }

        foreach($data->find('td.capacity') as $a){

            $result['capacity'][] =  $a->plaintext;
        }

    

   echo "<pre>";
    print_r($result);
  echo "</pre>";
?>

I get the answer:

Array
(
    [application] => Array
        (
            [0] => Двигатель (Б (бензиновый))
            [1] => Механическая трансмиссия
            [2] => Автоматическая трансмиссия
            [3] => Дифференциал
            [4] => Охлаждающая жидкость
            [5] => Модели с автотрансмиссией, дифференциал
            [6] => Тормозная жидкость
            [7] => Колесные подшипники
            [8] => Усилитель рулевого управления
        )

    [recommendation] => Array
        (
            [0] =>              Helix Ultra 0W-40                                     
            [1] =>              Refer To Owners Handbook                                     
            [2] =>              Spirax S2 ATF AX                                     
            [3] =>              От коробки передач                                     
            [4] =>              Refer To Owners Handbook                                     
            [5] =>              Spirax S5 ATE 75W-90                                     
            [6] =>              Refer To Technical                                     
            [7] =>              Gadus S3 V220C 2                                     
            [8] =>                                        (b)           
        )

    [capacity] => Array
        (
            [0] =>              5.0                        
            [1] =>                           (a)           
            [2] =>                           (a)           
            [3] =>                                      
            [4] =>              11.0                        
            [5] =>              1.0                        
            [6] =>                                      
            [7] =>                                      
            [8] =>                                      
        )

)

I will be grateful in advance for your help.

Answer 1

Use XPath , Luke.

<?php

// [1- Скачиваем файл
// Создаем поток
$opts = array(
  'http' => array(
    'method'  => 'GET',
    'timeout' => 10,
  ),
);

$context = stream_context_create($opts);

// Открываем файл с помощью установленных выше HTTP-заголовков
$page_content = file_get_contents('http://lubematch.shell.com/ru/ru/equipment/100_2_8i_avant_001755', false, $context);
// -1]

// [2- Парсим данные
// [3- Строим DOM
// по сути - отключаем вывод ошибок валидации
libxml_use_internal_errors(true);
$page_dom = new \DOMDocument();

$page_dom->strictErrorChecking = false;
$page_dom->preserveWhiteSpace  = false;
$page_dom->validateOnParse     = true;

$page_dom = new \DOMDocument();

// [4- loadHTML не дает использовать utf-8, делаем хаком http://php.net/manual/en/domdocument.loadhtml.php#95251
$page_dom->loadHTML('<?xml encoding="UTF-8">' . $page_content);

foreach ($page_dom->childNodes as $node) {
  if ($node->nodeType == XML_PI_NODE) {
    $page_dom->removeChild($node);
  }
}
$page_dom->encoding = 'UTF-8';
// -4]

$page_xpath = new \DOMXPath($page_dom);
// -3]

// Вытаскиваем Standard
$param_1 = $page_xpath->query('//table[@id="recommendation"]//tr[2]/th')->item(0)->nodeValue;
// Вытаскиваем Spirax S4 ATF HDX
$param_2 = $page_xpath->query('//table[@id="recommendation"]//tr[5]/td[1]')->item(0)->nodeValue;
// -2]

var_dump($param_1, $param_2);

Answer 2

If you look at the source code of the page, it will become clear why the marked text does not fall into the selection.
For example, you are looking for a td with the class recommendation , but not all tds in the third column have this class. For example <td>Spirax S4 ATF HDX</td>, this class does not exist here. Also, you don’t take data at all from the column in which the headers lie <th class="tiername tiername">Standard</th>, where do you get them from? =)
If I were you, I would parse using some other principle. What structure do you want to end up with?