php实现远程下载

/**
 * CURL下载文件 成功返回文件名，失败返回false
 * @param $url
 * @param string $savePath
 * @return bool|string
 * @author Zou Yiliang
 */
var_dump( httpcopy("https://www.jmwl51.com/addonszip/hwsms-1.0.0-regular.zip"));
 function httpcopy($url, $file="z.zip", $timeout=60) {
    $file = empty($file) ? pathinfo($url,PATHINFO_BASENAME) : $file;
    $dir = pathinfo($file,PATHINFO_DIRNAME);
    !is_dir($dir) && @mkdir($dir,0755,true);
    $url = str_replace(" ","%20",$url);

    if(function_exists('curl_init')) {
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
        $temp = curl_exec($ch);
        if(@file_put_contents($file, $temp) && !curl_error($ch)) {
            return $file;
        } else {
            return false;
        }
    } else {
        $opts = array(
            "http"=>array(
                "method"=>"GET",
                "header"=>"",
                "timeout"=>$timeout)
        );
        $context = stream_context_create($opts);
        if(@copy($url, $file, $context)) {
            //$http_response_header
            return $file;
        } else {
            return false;
        }
    }
}