How to save data of text area in php - php

Question

I'm a PHP learner. I have a website built on PHP. On the front end of one of our website pages there are four tabs. See the pic below for reference -
I want to add one more tab here. There should be a simple option of adding content in the admin panel for this tab (Which I have accomplished)
My problem is, when I am adding content to the text area in admin panel and hitting submit, the content disappears. I guess the content is not being stored in the database. I checked the SQL file made the possible changes. Although I'm not sure if I did it right. But I'm quite sure that there's a very small lag here which I am not able to figure out.
P.S. Check the screenshot of admin panel for more clarification about my issue.
The text area with heading Table of Contents - Simple is the one which I added. But as I mentioned, even if add content here and hit submit it becomes blank.
Below is the code of the page in screenshot -
"<?php
require_once '../config/config.php';
require_once '../class/dbclass.php';
require_once 'class/content.php';
require_once 'class/category.php';
require_once 'class/common.php';
require './isLogin.php';
$content = new Content();
$category = new Category();enter code here
$catList = $category->fetchCategoryTree();
//echo '<pre>';
//print_r($catList);
//echo '</pre>';
//exit;
//$catParentList = $category->fetchParentCategory(30);
//echo '<pre>';
//print_r($catParentList);
//echo '</pre>';
//echo implode("->",$catParentList);
//echo '<pre>';
//print_r(array_reverse($catParentList));
//echo '</pre>';
//exit;
$cat_id = 0;
$title = '';
$price = '';
$description = '';
$descriptions = '';
$author = $published = $report_code = '';
$content_id = isset($_REQUEST['id']) && $_REQUEST['id'] != "" ? $_REQUEST['id'] : 0;
//$category_list = $category->getAllCategory();
if ($content_id) {
$contentData = $content->getContentById($content_id);
$cat_id = isset($contentData[0]['cat_id']) ? $contentData[0]['cat_id'] : '';
$title = isset($contentData[0]['title']) ? $contentData[0]['title'] : '';
$price = isset($contentData[0]['price']) ? $contentData[0]['price'] : '';
$description = isset($contentData[0]['description']) ? $contentData[0]['description'] : '';
$descriptions = isset($contentData[0]['descriptions']) ? $contentData[0]['descriptions'] : '';
$report_code = isset($contentData[0]['report_code']) ? $contentData[0]['report_code'] : '';
$published = isset($contentData[0]['published']) ? $contentData[0]['published'] : '';
$author = isset($contentData[0]['author']) ? $contentData[0]['author'] : '';
}
if($content_id == 0)
$pageName = "Add Report";
else
$pageName = "Edit Report";
?>
<?php require_once './includes/header.php'; ?>
<?php require_once './includes/sidebar.php'; ?>
<!-- Content Wrapper. Contains page content -->
<div class="content-wrapper">
<!-- Content Header (Page header) -->
<section class="content-header">
<h1>
<b><?php echo $pageName; ?></b>
</h1>
<ol class="breadcrumb">
<li><i class="fa fa-dashboard"></i> Home</li>
<li class="active"><?php echo $pageName; ?></li>
</ol>
</section>
<!-- Main content -->
<section class="content">
<div class="row">
<!-- left column -->
<div class="col-md-12">
<!-- general form elements -->
<div class="box box-primary">
<div class="box-header with-border">
<?php if (isset($_SESSION['error_message']) && $_SESSION['error_message'] != ''): ?>
<div class="alert alert-danger alert-dismissable">
<button aria-hidden="true" data-dismiss="alert" class="close" type="button"><i class="glyphicon glyphicon-remove"></i></button>
<?php echo $_SESSION['error_message']; ?>
</div>
<?php endif; ?>
<?php if (isset($_SESSION['success_message']) && $_SESSION['success_message'] != ''): ?>
<div class="alert alert-success alert-dismissable">
<button aria-hidden="true" data-dismiss="alert" class="close" type="button"><i class="glyphicon glyphicon-remove"></i></button>
<?php echo $_SESSION['success_message']; ?>
</div>
<?php endif; ?>
<?php if (isset($_SESSION['info_message']) && $_SESSION['info_message'] != ''): ?>
<div class="alert alert-info alert-dismissable">
<button aria-hidden="true" data-dismiss="alert" class="close" type="button"><i class="glyphicon glyphicon-remove"></i></button>
<?php echo $_SESSION['info_message']; ?>
</div>
<?php endif; ?>
</div><!-- /.box-header -->
<!-- form start -->
<form id="content-form" action="models/contentProcess.php" enctype="multipart/form-data" method="post" novalidate>
<div class="box-body">
<input type="hidden" name="type" value="<?php echo ($content_id == 0) ? "addContent" : "editContent"; ?>">
<input type="hidden" name="content_id" id="content_id" value="<?php echo $content_id ?>">
<div class="form-group">
<label>Select Category</label>
<select id="cat_id" name="cat_id" class="form-control">
<?php foreach ($catList as $cl) { ?>
<option value="<?php echo $cl["id"] ?>" <?php echo ($cl["id"] == $cat_id) ? 'selected' : '' ; ?> ><?php echo $cl["name"]; ?></option>
<?php } ?>
</select>
</div>
<div class="form-group">
<label>Title</label>
<input type="text" name="title" id="title" placeholder="Enter title" class="form-control" value="<?php echo $title ?>">
</div>
<div class="form-group">
<label>Report Code</label>
<input type="text" name="report_code" id="report_code" placeholder="Enter Report Code" class="form-control" value="<?php echo $report_code ?>">
</div>
<div class="form-group">
<label>Image</label>
<input type="file" class="btn btn-default btn-file" name="image" id="image">
</div>
<div class="form-group">
<label>Published</label>
<input type="text" name="published" id="published" placeholder="Enter published" class="form-control" value="<?php echo $published ?>">
</div>
<div class="form-group">
<label>Author</label>
<input type="text" name="author" id="author" placeholder="Enter author" class="form-control" value="<?php echo $author ?>">
</div>
<div class="form-group">
<label>Price</label>
<input type="text" name="price" id="price" placeholder="Enter price" class="form-control" value="<?php echo $price ?>">
</div>
<div class="form-group">
<label>Description</label>
<textarea id="description" name="description" class="form-control" rows="10" cols="80">
<?php echo $description; ?>
</textarea>
</div>
<div class="form-group">
<label>Table of Contents - Simple</label>
<textarea id="descriptions" name="descriptions" class="form-control" rows="15" cols="100">
<?php echo $descriptions; ?>
</textarea>
</div>
<button class="btn btn-primary" type="submit" id="submitform">Submit</button>
Cancel
</div>
</form>
</div><!-- /.box -->
</div><!--/.col (left) -->
<!-- right column -->
</div> <!-- /.row -->
</section><!-- /.content -->
</div><!-- /.content-wrapper -->
<?php require_once './includes/footer.php'; ?>
<script type="text/javascript" src="<?php echo ADMIN_ROOT; ?>plugins/ckeditor/ckeditor.js"></script>
<script language="javascript">
CKEDITOR.replace('descriptions',{
//uiColor:"#532F12",
toolbar: 'MyToolbar',
});
</script>
<script language="javascript">
CKEDITOR.replace('description',{
//uiColor:"#532F12",
toolbar: 'MyToolbar',
});
</script>"
Code snippet of reportDetail.php
<div class="tab-content" style="min-height:775px;">
<div id="menu1" class="tab-pane <?php if (!isset($_SESSION['user_id'])) { ?>active<?php } ?>" style="overflow: auto;<?php if (isset($_SESSION['user_id']) && $_SESSION['user_id'] > 0) { ?>max-height: 1520px;<?php } else { ?> height: 795px;<?php } ?>">
<?= $contentData['description'] ?>
</div>
<div id="menu2" class="tab-pane fade <?php if (isset($_SESSION['user_id']) && $_SESSION['user_id'] > 0) { ?>active in<?php } ?>" style="overflow: auto;<?php if (isset($_SESSION['user_id']) && $_SESSION['user_id'] > 0) { ?>max-height: 1520px;<?php } else { ?> height: 795px;<?php } ?>">
<?= $contentData['descriptions'] ?>
</div>
<div id="menu3" class="tab-pane fade <?php if (isset($_SESSION['user_id']) && $_SESSION['user_id'] > 0) { ?>active in1<?php } ?>" >

Answer 1

html:-
<form action="" method="post">
<textarea name="textarea" rows="10" cols="50"></textarea>
<input type="submit" name="submit">
</form>
php:-
if(isset($_POST["submit"]))
{
$yourtextarea= $_POST["textarea"];
}