PHP: MPDF export from multiple textares/textboxes - php

Question

So, I'm using MPDF to export data/content from one textarea. It works perfectly fine for one textarea, but what happens when I need to export multiple texboxes with a button click? Doing it this way (as shown below) it only exports the last textarea only. I need your help to figure this out how to export from multiple textareas. Thank you.
My form.
The textareas with its content is being echoed/displayed using a while loop as shown below.
<form method='post' action='thanks.php' enctype="multipart/form-data">
<?php
while ($rows = mysqli_fetch_assoc($result)) {
?>
<textarea name="editor" id="editor">
<?= $rows['Content']; ?>
</textarea><br>
<input type="submit" name="export" value="Export" id="export" class="btn third">
<?php
}
?>
</form>
Export coding.
<?php
require_once __DIR__ . '/vendor/autoload.php';
if ((isset($_POST['editor'])) && (!empty($_POST['editor']))) {
$pdfcontent = $_POST['editor'];
$mpdf = new \Mpdf\Mpdf();
$mpdf->WriteHTML($pdfcontent);
// $mpdf->SetDisplayMode('fullpage');
// $mpdf->list_indent_first_level = 0;
//output in browser
$mpdf->Output('mypdf.pdf', 'D');
}
?>

Answer 1

You have to give each textarea another name, so each one gets included when you submit the form. One way of doing this is to use a counter:
<form method='post' action='thanks.php' enctype="multipart/form-data">
<?php
$areaCount = 1;
while ($rows = mysqli_fetch_assoc($result)) {
echo '<textarea name="editor_' . $areaCount . '" id="editor">'.
$rows['Content'] . '</textarea><br>';
$areaCount++;
}
?>
<input type="submit" name="export" value="Export" id="export" class="btn third">
</form>
Now when the form is submitted you have to find all the areas again:
<?php
require_once __DIR__ . '/vendor/autoload.php';
if (isset($_POST['export'])) {
$pdfcontent = '';
$areaCount = 1;
while (isset($_POST['editor_' . $areaCount])) {
$pdfcontent .= $_POST['editor_' . $areaCount];
$areaCount++;
}
$mpdf = new \Mpdf\Mpdf();
$mpdf->WriteHTML($pdfcontent);
// $mpdf->SetDisplayMode('fullpage');
// $mpdf->list_indent_first_level = 0;
//output in browser
$mpdf->Output('mypdf.pdf', 'D');
}
?>