lacheney on "Query Wordpress database by registered date and role"

Thanks. I'm getting an error when i try and put my code in though.

while ($row = mysql_fetch_array($result))
{
    echo "Name :{$row['user_login']} <br>" .
         "Email : {$row['user_email']} <br>" .
         "User Level : {$row['meta_key']} <br><br>";
         "Value of User Level : {$row['meta_value']} <br><br>";
}

works fine.

But when I use

while ($row = mysql_fetch_array($result))
	{
        //-------- Subscribe --------//
        $postdata = http_build_query(
            array(
            'name' => $row['user_login'],
		    'email' => $row['user_email'],
		    'list' => "xoYWaOYnRsu6KPliTC70Gg",
		    'boolean' => 'true'
            )
        );
        $opts = array('http' => array('method'  => 'POST', 'header'  => 'Content-type: application/x-www-form-urlencoded', 'content' => $postdata));
        $context  = stream_context_create($opts);
        $result = file_get_contents($sendy_installation_url.'/subscribe', false, $context);
        //-------- Subscribe --------//
	}

I get the error

Warning: mysql_fetch_array() expects parameter 1 to be resource, string given in URL on line 19

Line 19 is while ($row = mysql_fetch_array($result))