On Fri, 2 Jan 2009, Marc Fromm wrote:
> If I gather the sql results with this code
> $results = pg_query($dbconn,$query);
>
> I can check if there is no returned data with this code
> $rows = pg_fetch_assoc($result);
>
> but if I then use a while loop to display data (if there is data returned) with this code
> while ($row = pg_fetch_array($result)){ . . . }
>
> I have to execute this code a second time before the while loop
> $results = pg_query($dbconn,$query);
>
> If I do not execute the $results line a second time the while loop does not work properly.
>
> Why is $results loosing its value when it hits the while loop?
>
> Thanks
>
> Marc
pg_fetch_assoc behave like pg_fetch_array: it increments the internal
pointer to the current result.
So if you call it once, then pg_fetch_array will return the 2nd result in
the result set.
You can either :
- use pg_fetch_assoc($result,0) whish shouldn't increment the internal
pointer (no sure though, check http://php.net/pg-fetch-assoc)
- seek back to the first result in the result set using pg-result-seek
(http://php.net/pg-result-seek)
- use pg_num_rows to get the number of rows in your result set.
Happy new year !
--
Guillaume (ioguix) de Rorthais