PHP to upload an avatar image to App.net

avatar.php

<?

// App.net Avatar uploader
// @Kosso

$access_token = 'AQAAAAAAAXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX';

$file_path = 'some_hilarious.gif';
$mime_type = 'image/gif';

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, "https://alpha-api.app.net/stream/0/users/me/avatar");
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Authorization: Bearer '.$access_token));
curl_setopt($ch, CURLOPT_VERBOSE, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POST, true);

$post = array(
    "avatar"=>"@".$file_path.";type=".$mime_type.";"
);

curl_setopt($ch, CURLOPT_POSTFIELDS, $post); 
$response = json_decode(curl_exec($ch));

echo 'Result:<br /><pre>';
print_r($response);
echo '</pre>';

?>