将远程图片保存到自己的服务器

/*
 * @function:将微信头像保存到自己的服务器中
 * @param url图片链接地址
 * @param 服务器根目录
 * @date:2019-10-21
 * */
static function download_remote_pic($url,$dir){
    $header = [
        'User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko/20100101 Firefox/45.0',
        'Accept-Language: zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3',
        'Accept-Encoding: gzip, deflate',
    ];
    $curl = curl_init();
    curl_setopt($curl, CURLOPT_URL, $url);
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
    curl_setopt($curl, CURLOPT_ENCODING, 'gzip');
    curl_setopt($curl, CURLOPT_HTTPHEADER, $header);
    $data = curl_exec($curl);
    $code = curl_getinfo($curl, CURLINFO_HTTP_CODE);
    curl_close($curl);
    if ($code == 200) {//把URL格式的图片转成base64_encode格式的！
        $imgBase64Code = "data:image/jpeg;base64," . base64_encode($data);
    }
    $img_content=$imgBase64Code;//图片内容

    if (preg_match('/^(data:\s*image\/(\w+);base64,)/', $img_content, $result)) {
        $type = $result[2];//得到图片类型png?jpg?gif?
        $new_dir="/tmp/upload/avator/".date("Ymd",time());
        if(!is_dir($dir.$new_dir)){
            mkdir($dir.$new_dir,0777,true);
        }
        $new_file = $new_dir.'/'.time().rand(1,10000).".{$type}";
        $imgs     = base64_decode(str_replace($result[1], '', $img_content));
        $fp2      = fopen($dir.$new_file , "a");
        fwrite($fp2, $imgs);
        fclose($fp2);
        return $new_file;
    }
}