Description:
------------
queries like
"SELECT FIELD1, ...FIELD_i FROM
TABLENAME WHERE..." 
are ok.
but:

SELECT FIELD1, 
(SELECT SUM(XYZ) FROM TABLE2 WHERE FIELD=T1.NAME) AS VIRTNAME,
FIELD_i
FROM TABLE1 T1
WHERE...

leads to an error:
Fatal error: Cannot access empty property
in 
[PHP]
first:
$this->result=ibase_query($this->sqlQuery);

while($k<$numFields)
			                {
			                	$feldinfo=ibase_field_info($this->result,$k);
			                	$colNames[]=$feldinfo['name'];
			                	$k++;
			                }
then:

$datensatz = ibase_fetch_object($this->result);
$row[$colNames[$i]]=
$datensatz->$colNames[$i];<<----there

a direct access leads as well to an error:
$datensatz->VIRTNAME....

i hope its not too much text...




Reproduce code:
---------------
you can get the class in detail from
http://pilaf.ath.cx/pub/upload/upload/class_IBtable.txt


Actual result:
--------------
print_r(ibase_field_info($this->result,$k))--->
Array ( [0] => [name] => [1] => [alias] => [2] => [relation] => [3] => 8 [length] => 8 [4] => NUMERIC(18,2) [type] => NUMERIC(18,2) ) felder:1
.....