Imgur Error 400 "Invalid URL ()"

[Alex]

For upload image working next code:

    $client_id = "123123asdasd3123"; //example(not real) client_id
    $Mashape_Key = "fsdfasdfdfarewr2342432231231"; //example(not real) X-Mashape-Key
    $headers = array('Authorization: Client-ID ' . $client_id, 'X-Mashape-Key: ' . $Mashape_Key);
   
    $image = $_POST['url']; // i send image url, example http://i.imgur.com/w9eZVxW.png
    $post_arr = array(
        'image' => $image,
        'type' => 'url',
        'name' => 'test_name',
        'title' => 'test title',
        'description' => 'blablabla'
    );


    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, 'https://imgur-apiv3.p.mashape.com/3/image');
    curl_setopt($ch, CURLOPT_POST, TRUE);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
    curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $post_arr);


    $reply = curl_exec($ch);
    var_dump($reply);
    curl_close($ch);


    $reply = json_decode($reply);
    $newimgurl = $reply->data->link;


    echo $newimgurl;

But i get error:

string(105) "{"data":{"error":"Invalid URL ()","request":"\/3\/image\/","method":"POST"},"success":false,"status":400}"

Tell me please what url need ?