<?php
    header('Content-type: image/jpg');
    $url = $_GET['url'];
    $refer = "http://www.qq.com/";
    $opt = [
            'http'=>[
                'header'=>"Referer: " . $refer
            ]
           ];
    $context = stream_context_create($opt); 
    $file_contents = file_get_contents($url,false, $context);
    echo $file_contents;