upload file to server by curl post

curl_post_file

Client
<?php
class HTTPClient {
    
    function __construct($url, $port = 80)
    {
        $this->url  = $url;
        $this->port = $port;
    }

    function postTo()
    {
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_HEADER, 0);
        curl_setopt($ch, CURLOPT_VERBOSE, 0);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/4.0 (compatible;)");
        curl_setopt($ch, CURLOPT_HEADER, 1);
        curl_setopt($ch, CURLOPT_HTTPHEADER, $requestHeader);
        curl_setopt($ch, CURLOPT_URL, $this->url);
        curl_setopt($ch, CURLOPT_PORT, $this->port);
        curl_setopt($ch, CURLOPT_POST, true);

        curl_setopt($ch, CURLOPT_POSTFIELDS, array(
            'Filedata'  => '@E:/log.txt',
        ));
        $response = curl_exec($ch);
        curl_close($ch);
        return $response;
    }
}
$url = "http://678bt.com";
$client = new HTTPClient($url);
$resp = $client->postTo();
echo $resp;


?>

SERVER:

<?php

if ($_POST) {
    file_put_contents("./log.txt", serialize($_FILES));
    move_uploaded_file($_FILES['Filedata']['tmp_name'], "./test.txt");
}