//variables y conexion mysql
$hostname="localhost";
$username="myinvestpa";
$password="jPd4qB06";
$dbname="investpainbbdd";
$conn = mysqli_connect($hostname,$username,$password) or die ("<html><script language='JavaScript'>alert('Unable to connect to database! Please try again later.'),history.go(-1)</script></html>");
mysqli_select_db($conn,$dbname);
$query = "SELECT *
FROM wp_usermeta um1
WHERE um1.user_id IN ( SELECT um2.user_id FROM wp_usermeta um2 WHERE um2.meta_key = 'patrocinador' and um2.meta_value = '"$patrocinador"')";