PHPExcel - Row Validation

<?php
$reader = PHPExcel_IOFactory::createReader('Excel2007');
$reader->setReadDataOnly(true);
$file = isset($_FILES["uploadexcel"]['tmp_name']) ? $_FILES["uploadexcel"]['tmp_name'] : '';
$objPHPExcel = $reader->load($file);
$objWorksheet = $objPHPExcel->getActiveSheet();
$header=true;
if ($header) {
    $highestRow = $objWorksheet->getHighestRow();
    $highestColumn = $objWorksheet->getHighestColumn();
    $headingsArray = $objWorksheet->rangeToArray('A1:'.$highestColumn.'1',null,true,true,true);
    $headingsArray = $headingsArray[1];
    $r = -1;
    $namedDataArray = array();
/**/$required=['category_1','language','f_n','publishers','cost','cost_currency'];
    for ($row = 2; $row <= $highestRow; ++$row) {
        $dataRow = $objWorksheet->rangeToArray('A'.$row.':'.$highestColumn.$row,null,true,true,true);
        if ((isset($dataRow[$row]['A'])) && ($dataRow[$row]['A'] > '')) {
            ++$r;
/**/        $row_check[$r]=[];
            foreach ($headingsArray as $columnKey => $columnHeading) {
/**/            if(in_array($columnHeading,$required) && is_null($dataRow[$row][$columnKey])){
/**/                $row_check[$r][]=$columnHeading;
/**/            }
                $namedDataArray[$r][$columnHeading] = $dataRow[$row][$columnKey];
            }
        }
    }
} else {
    //excel sheet with no header
    $namedDataArray = $objWorksheet->toArray(null, true, true, true);
}
echo '<pre>';
/**/var_export($row_check);
    // a row that passes will have an empty subarray (e.g. keys 1,8,10,16)
    // otherwise, the subarray will list all failing cells by columnname
print_r($namedDataArray);
exit;
?>