Test PHP / ODBC / Virtuoso connection

The __virt_internal_dsn() function returns:

Connected [%s].\n
\n", $con);

    $query="sparql select distinct ?s ?p ?o from  
    where { ?s ?p ?o . } limit 100";

    print "Executing query [$query]
\n";
    $rs = odbc_exec($con, $query);

    $err=odbc_errormsg($con);
    print "Current error state: [$err]
\n";

    print "Results:
\n";
    odbc_result_all($rs, "border=2");
    odbc_close($con);
  } else {
    print "
Failed to connect!
\n";
  }
?>

?>