Filtering a multi-dimensional Array in PHP

I have a multi-dimensional array that always contains one completely blank row.
How do I remove this one blank row?  The individual elements may or may not be blank.
If they all are blank (or null ?) then I want to get rid of that row.
 I have used array_filter on a one dimensional array,
but never for a  multi-dimensional array. I am not sure why I have a blank row, I check where and when I increment my index, and I think I am good.
Below are the two errors I receive

Notice: Uninitialized string offset

 Illegal string offset :

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And this is the structure of my array:

$_SESSION['GlobalRegionIndex'] = 0;

$_SESSION['GlobalRegionArray'] = array();
$_SESSION['GlobalRegionArray'] = array(
                   'strRegionFile' => '',
         'strRegionFileName' => '',
         'strRegionProdLocation' => '',
         'strRegionAwsLocation' => '',
         'strRegionSupplierCode' => '',
         'strRegionConfNbr' => '',
         'strRegionStatus' =>'');

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Any help/explanation is appreciated. Thank you in advance.