How to create a series of PDFs in PHP 7.3.5 via domdpf?

Question

PHP

Hello, I'll try to explain the essence:
php 7.3.5
dompdf latest version from https://github.com/dompdf/
1. I want to download Wikipedia.
1.1. take an article, for example $url = ' https://ru.wikipedia.org/wiki/Host ';
1.2. we pump out the necessary links to related articles from the necessary div-a in the article p. 1.1.:
it turns out like this:

1.3. then I want to create a pdf in a cycle for each link from the picture, but it turns out only to make the whole code for the 1st link
:

<?php
// reference the Dompdf namespace
require_once 'dompdf/autoload.inc.php';

use Dompdf\Dompdf;
use Dompdf\Options;


//download image
/*function file_get_contents_curl($url) { 
    $ch = curl_init(); 
  
    curl_setopt($ch, CURLOPT_HEADER, 0); 
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); 
    curl_setopt($ch, CURLOPT_URL, $url); 
  
    $data = curl_exec($ch); 
    curl_close($ch); 
  
    return $data; 
} 
  
//$data = file_get_contents_curl( $url ); 
//$fp = 'logo-1.png'; 
//file_put_contents( $fp, $data ); 
//echo "File downloaded!"
*/

// instantiate and use the dompdf class
//get HTML by URL
$url = 'https://ru.wikipedia.org/wiki/Хост';
$html = file_get_contents($url);

$dom = new DOMDocument();
$dom->loadHTML($html);

//get all a-tags from div.mw-body-content
$links = [];
$xPath = new DOMXPath($dom);
$anchorTags = $xPath->evaluate("//div[@class=\"mw-body-content\"]//a/@href");

foreach ($anchorTags  as $anchorTag) {
    $links[] = $anchorTag->nodeValue;
}

foreach($links as $link) {

  //decode url to cyrillic
  $linkDecoded = urldecode($link);

  //if url contains unneeded words, delete them
  if ( (strpos($linkDecoded, 'Категори') === false) && (strpos($linkDecoded, 'Википедия') === false) && 
    (strpos($linkDecoded, 'index.php') === false) && (strpos($linkDecoded, 'Файл') === false) && 
    (strpos($linkDecoded, '#') === false) ) {
    
    //if $linkDecoded[0] === '/' -> add 'https://ru.wikipedia.org'
    if ($linkDecoded[0] === '/') {
      $linkDecoded  = 'https://wikipedia.ru.org' . $linkDecoded . '<br>';

      // 5 === len(wiki/); https://stackoverflow.com/questions/11290279/get-everything-after-word
      $title = substr($linkDecoded, strpos($linkDecoded, 'wiki/') +5); 
      
      echo $linkDecoded;

      //DOMpdf -> pdf
      $options = new Options();

      $options->set('defaultFont', 'DejaVu Sans');

      //не было тут его, если что - убрать
      $html = file_get_contents($url);

      $dompdf = new Dompdf($options);
      $dompdf->loadHtml($html);

      //(Optional) Setup the paper size and orientation
      $dompdf->setPaper('A4', 'landscape');
      // Render the HTML as PDF
      $dompdf->render();
      
      // Output the generated PDF to Browser
      //title is basename === https://wikipedia.ru.org/wiki/             ->      Протокол_передачи_данных
      $dompdf->stream($title); 
    } 
  }
}

Who will tell you how to make a PDF from all the links from the picture?

Answer 1

the problem is that the render method issues a return and it turns out that only one turn is processed in the loop. you need to collect the html message in a loop using concatenation and only then submit one large html for conversion to pdf
, something like this you should have

$html = '';

foreach($links as $link) {

  //decode url to cyrillic
  $linkDecoded = urldecode($link);

  //if url contains unneeded words, delete them
  if ( (strpos($linkDecoded, 'Категори') === false) && (strpos($linkDecoded, 'Википедия') === false) && 
    (strpos($linkDecoded, 'index.php') === false) && (strpos($linkDecoded, 'Файл') === false) && 
    (strpos($linkDecoded, '#') === false) ) {
    
    //if $linkDecoded[0] === '/' -> add 'https://ru.wikipedia.org'
    if ($linkDecoded[0] === '/') {
      $linkDecoded  = 'https://wikipedia.ru.org' . $linkDecoded . '<br>';

      // 5 === len(wiki/); https://stackoverflow.com/questions/11290279/get-everything-after-word
      $title = substr($linkDecoded, strpos($linkDecoded, 'wiki/') +5); 
      
      echo $linkDecoded;

      

      //не было тут его, если что - убрать
      $html .= file_get_contents($url);
    } 
  }
}

//DOMpdf -> pdf
      $options = new Options();

      $options->set('defaultFont', 'DejaVu Sans');

$dompdf = new Dompdf($options);
      $dompdf->loadHtml($html);

      //(Optional) Setup the paper size and orientation
      $dompdf->setPaper('A4', 'landscape');
      // Render the HTML as PDF
      $dompdf->render();
      
      // Output the generated PDF to Browser
      //title is basename === https://wikipedia.ru.org/wiki/             ->      Протокол_передачи_данных
      $dompdf->stream($title);

Answer 2

thanks, as always let down by inattention:
instead of
necessary

$linkDecoded  = 'https://ru.wikipedia.org' . $linkDecoded;