Looping through columns and rows in PHPExcel to create objects

I'm using PHPExcel library to loop through my excel spreadsheet. This is my current script :

try
{
    $inputfiletype = PHPExcel_IOFactory::identify($inputfilename);
    $objReader = PHPExcel_IOFactory::createReader($inputfiletype);
    $objPHPExcel = $objReader->load($inputfilename);
      $r = array( 'd' => true );
}
catch(Exception $e)
{
    die('Error loading file "'.pathinfo($inputfilename,PATHINFO_BASENAME).'": '.$e->getMessage());
      $r = array( 'd' => false );
}

//  Get worksheet dimensions
$sheet = $objPHPExcel->getSheet(0); 
$highestRow = $sheet->getHighestRow(); 
$highestColumn = $sheet->getHighestColumn();

//  Loop through each row of the worksheet in turn
for ($row = 1; $row <= $highestRow; $row++)
{ 
    //  Read a row of data into an array
    $rowData = $sheet->rangeToArray('A' . $row . ':' . $highestColumn . $row, NULL, TRUE, FALSE);
    echo $rowData[0][0] . '</br>';

}

This is my spreadsheet :

What I'm trying to do is loop through each row, ignore the nulls and produce an object with the column name. For the example in the above image row 5 would produce :

{HVHV001OXLG:{
           A5AR:"152",
           A5AM:"988",
           A5AL:"100"
}
}

Is it possible to produce something like this from the format of my spreadsheet?