Hello,
Yes, you can use the height option applied to specific rows.
The following sample set a height of 1cm for the second row:
$trProperties = array();
// the second position of the array is the second row
$trProperties[1] = array(
'height' => 567,
);
$values = array(
array(
11,
12,
13,
14
),
array(
21,
22,
23,
24
),
array(
31,
32,
33,
34
),
);
$docx->addTable($values, array(), $trProperties);
As a fixed height (Exactly value) is applied to the row, if you add extra content into the cell higher than the row height it won't appear.
If needed you can also set fixed width sizes for the table and columns.
Regards.