Administrator or subscriber? Let’s see a quick way to check it!

global $user_ID;
//
$capabilities = get_usermeta( $user_ID, 'wp_capabilities');
//
if ( is_array( $capabilities ) ) 
{
  if( $capabilities['Administrator'] == 1 || $capabilities['administrator'] == 1 ) {
    echo "You are an Administrator";
  }
}


Shorter

global $user_ID;
//
$capabilities = get_usermeta( $user_ID, 'wp_capabilities');
// $admin will be true when administrator
$admin = ( $capabilities['Administrator'] == 1 || $capabilities['administrator'] == 1 );


Of course, you can check also the rest of WordPress roles, such as “subscriber” for example.