PHP/SQL, Anomalous behaviour with Assoc value

I am making an SQL query through PHP, and I need to retrieve a field called shipdate carrying a Datetime object.

Now,

$databk=sqlsrv_fetch_array( $qbk, SQLSRV_FETCH_ASSOC);

If I write

print_r($databk);

following is the output:

Array ( [prc_iva] => 22.00 [clientCode] => 000003 [artCode] => LEODRG-1104 [quantity] => 3 [shipdate] => DateTime Object ( [date] => 2014-04-23 00:00:00 [timezone_type] => 3 [timezone] => Europe/Belgrade ) [cod_um] => PZ [cod_art] => LEODRG-1104 [des_articolo] => SCATOLE C/FIORI PORCE [cod_immagine_small] => LEODRG-1104PIC.jpg [prz_listino] => 2.750000)

As you can see, we have the shipdate field here.

But, if I write

echo $databk['shipdate'];

the output is null/(blank string).

Now, here's why it gets creepy:

I used exactly the same query on another page. To be honest, I just copy-pasted the query so even the variable names are same. It works on the other page, but here is the problem on this page.

I need to resolve this as soon as possible. Thanks for your help, if any, in advance.

Ask for any additional information, if required. I shall be quick

EDIT2: Apparently, I couldn't echo date. But here's the new question. Why could I do it on another page. In fact, I still do. Why does it work at one place and not at the other?