Rofl wordpress relative urls

rofl.php

<?php

namespace Api\Utils;

class RelativeUrls
{
    public function __construct()
    {
        // get the path
        $uri_path = parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH);

        // exclude the urls from the replace
        $exclude = [
            '/wp-json/posts/single/',
            '/wp-json/document/',
        ];

        $enable = true;

        // loop through whitelisted prefixes
        foreach ($exclude as $prefix) {
            // if we have matched one
            if (substr($uri_path, 0, strlen($prefix)) !== $prefix) {
                // disable object find/replace
                $enable = false;
            }
        }

        if ($enable) {
            // http://codex.wordpress.org/Plugin_API/Action_Reference
            add_action('registered_taxonomy', [$this, 'bufferStartRelativeUrl']);
            add_action('shutdown', [$this, 'bufferEndRelativeUrl']);
        }
    }

    public function bufferStartRelativeUrl()
    {
        ob_start([$this, 'callbackRelativeUrl']);
    }

    public function bufferEndRelativeUrl()
    {
        @ob_end_flush();
    }

    public function callbackRelativeUrl($buffer)
    {
        // Replace normal URLs
        $home_url = esc_url(home_url('/'));

        // remove base domain - DISABLED
        $home_url_relative = wp_make_link_relative($home_url);

        // get base domain from .env file instead of db lol...
        //$home_url_relative = getenv('ATHERTON_WP_DOMAIN') . wp_make_link_relative($home_url);

        // Replace URLs in inline scripts
        $home_url_escaped = str_replace('/', '\/', $home_url);
        $home_url_escaped_relative = str_replace('/', '\/', $home_url_relative);

        $buffer = str_replace($home_url, $home_url_relative, $buffer);
        $buffer = str_replace($home_url_escaped, $home_url_escaped_relative, $buffer);

        return $buffer;
    }
}