using select where statement using php variables [closed] - php

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this is a code block to load data from database into a table structure in the page. the select statement is used to load data. but in the page it display the following error message mysqli error message
<div class="container">
<div class="row">
<h3>Company Overview </h3>
</div>
<div class="row">
<table class="table table-striped table-bordered">
<thead>
<tr>
<th>Company</th>
<th>Overview</th>
<th>Address</th>
<th>Contact_Number</th>
<th>Created By</th>
<th>Action</th>
</tr>
</thead>
<tbody>
<?php include('sessions.php');
$login_session;
$sql = 'SELECT * FROM company_overview where created_by LIKE "' . $login_session . '" '; ?>
<?php $result = mysqli_query($conn, $sql); ?>
<?php while ($row = mysqli_fetch_array($result)) {
?>
<?php echo '<tr>'; ?>
<?php echo '<td>' . $row['company_name'] . '</td>'; ?>
<?php echo '<td>' . $row['company_overview'] . '</td>'; ?>
<?php echo '<td>' . $row['address'] . '</td>'; ?>
<?php echo '<td>' . $row['contact_no'] . '</td>'; ?>
<?php echo '<td>' . $row['created_by'] . '</td>'; ?>
<?php echo '<td width=250>'; ?>
<?php echo '<a class="btn btn-success" href="update_p.php">Update</a>'; ?>
<?php echo ' '; ?>
<?php echo '<a class="btn btn-danger" href="delete_promotion.php?id=' . $row['id'] . '">Delete</a>'; ?>
<?php echo '</td>'; ?>
<?php echo '</tr>'; ?>
<?php include('o_sessions.php'); ?>
<?php } ?>
<?php //mysqli_close($conn); ?>
</tbody>
</table>
</div>
</div> <!-- /container -->

Answer 1

add appropriate column name after WHERE statement and add % in like:
$sql = 'SELECT * FROM company_overview where column_name LIKE "%'.$login_session.'%" ';

Answer 2

Use mysqli_num_rows() to check your query contain result or not.
Use column name with WHERE and use %..% with LIKE.
Your code contains extra open close <?php ?> please correct it.
Please check comments and change your code. I have added mysqli_num_rows() and prevent your code from error. Other things you can do it by yourself.
<?php
include('sessions.php');
$login_session;
$sql = 'SELECT * FROM company_overview where id LIKE "%'.$login_session.'%" ';
$result=mysqli_query($conn,$sql);
if(mysqli_num_rows($result) > 0)
{
while($row=mysqli_fetch_array($result))
{
?>
<?php echo '<tr>';?>
<?php echo '<td>'. $row['company_name'] . '</td>';?>
<?php echo '<td>'. $row['company_overview'] . '</td>';?>
<?php echo '<td>'. $row['address'] . '</td>';?>
<?php echo '<td>'. $row['contact_no'] . '</td>';?>
<?php echo '<td>'. $row['created_by'] . '</td>';?>
<?php echo '<td width=250>';?>
<?php echo '<a class="btn btn-success" href="update_p.php">Update</a>';?>
<?php echo ' ';?>
<?php echo '<a class="btn btn-danger" href="delete_promotion.php?id='.$row['id'].'">Delete</a>';?>
<?php echo '</td>';?>
<?php echo '</tr>';?>
<?php include('o_sessions.php');?>
<?php } }?>
<?php //mysqli_close($conn);?>
</tbody>