Замена относительных ссылок на абсолютные в rss.out

result_modifier.php

<?php
$isHttps = !empty($_SERVER['HTTPS']) && 'off' !== strtolower($_SERVER['HTTPS']);
$domain = ($isHttps ? "https" : "http") . "://".$_SERVER[HTTP_HOST];

foreach ($arResult['ITEMS'] as $key => $arItem){
    $arResult['ITEMS'][$key]['description'] = html_entity_decode($arItem["description"]);
    
    $full_text = html_entity_decode($arItem["full-text"]);
    $full_text = preg_replace("/(href|src)\=\"([^(http)])(\/)?/", "$1=\"$domain$2", $full_text);
    $arResult['ITEMS'][$key]['full-text'] = $full_text;
    
}