The function fieldCount() returns the number of columns in a row of a recordset.

 
$SQL = "SELECT * FROM emp";
$recordSet = $conn->Execute($SQL);
$cols = $recordSet->fieldCount();
for($i=0;$i<$cols;$i++){
    $fld = $f->FetchField($i);
    print_r($fld);
    $t = $f->MetaType($fld->type);
    print_r($t);
}