I'm trying to create an array to use for a curl_multi_exec, but I can't seem to create the array properly.

Here is my code:

        $SQL = mysql_query("SELECT url FROM urls") or die(mysql_error()); //Query the shell table
                                                while($resultSet = mysql_fetch_array($SQL)){    
                                                        $urls[]=$resultSet;
                                                }

echo $urls; //Test that the array works

But when I run this script, all it does is echo "Array"

I have no idea what I'm doing wrong, I've checked around google a bit, but can't figure it out. Any insight would be appreciated.