Medium to r-bloggers

index.php

<?php
header('Content-Type: text/xml');

$xml = new DOMDocument; 
$url = "https://medium.com/feed/@zappingseb";
$xml->load($url);

$book = $xml->documentElement;

// we retrieve the chapter and remove it from the book
$channel= $book->getElementsByTagName('channel')->item(0);
$items = $channel->getElementsByTagName('item');

$domArray = array(); //set up an array to catch all our nodes

foreach ($items as $i){
    //echo $i->nodeValue;
    //$title = $i->getElementsByTagName('title')->item(0);
    //echo $title->nodeValue;
    //echo "xx<br/>";

    $categories = $i->getElementsByTagName('category');
    $found = false;

    foreach($categories as $category){
        if($category->nodeValue == "r"){
  
           $found = true;
           break;
        }
    }
    if(!$found){
       $domArray[] = $i;
       
    }
}
foreach($domArray as $i){ 
    $channel->removeChild($i);
}

echo $xml->saveXML(); 

?>