php下载网络图片到电脑

<?php

namespace App\Handles;

class DownloadImg{
    /**
     * @param $url
     * 下载网络上的图片到浏览器
     */
    public function downloadImage($url){
        $filename = basename($url);
        $headers = get_headers($url, 1);
        $fileSize = $headers['Content-Length'];
        header('Content-Type: application/octet-stream');
        header('Accept-Ranges:bytes');
        header('Content-Length: ' . $fileSize);
        header('Content-Disposition: attachment; filename="' . $filename . '"');
        readfile($url);
        exit;
    }