Adding an Extra Empty Column While Reading An .xlsx file in PHP - php

Question

I edited a PHP code that reads an Excel Spreadsheet (.xlsx form) and displays it very well.
But I want an extra column to be added when PHP page displays the Spreadsheet. (For textareas to update one cell in each row.)
What can I do for it?
Thanks.
<?php
if((!empty($_FILES["file"])) && ($_FILES['file']['error'] == 0)) {
$limitSize = 15000000;
require_once "simplexlsx.class.php";
$getWorksheetName = array();
$xlsx = new SimpleXLSX( $_FILES['file']['tmp_name'] );
$getWorksheetName = $xlsx->getWorksheetName();
echo ' <hr>
<div id="datacontent">
';
'<div id="datacontent">';
for($j=1;$j <= $xlsx->sheetsCount();$j++){
echo '<h3>Tablodaki Worksheet: '.$getWorksheetName[$j-1].'</h1>';
echo '<table id="xlsxTable">';
list($cols,) = $xlsx->dimension($j);
foreach( $xlsx->rows($j+1) as $k => $r) {
if ($k == 0){
$trOpen = '<th';
$trClose = '</th>';
$tbOpen = '<thead>';
$tbClose = '</thead>';
}else{
$trOpen = '<td';
$trClose = '</td>';
$tbOpen = '<tbody>';
$tbClose = '</tbody>';
}
echo $tbOpen;
echo '<tr>';
for( $i = 0; $i < $cols; $i++)
echo $trOpen.'>'.( (isset($r[$i])) ? $r[$i] : ' ' ).$trClose;
echo '</tr>';
echo $tbClose;
}
echo '</table>';
}
}
?>