<form method="post" action="search.php">
<input type="text" name="search" placeholder="Search...">
<button type="submit" name="submit">Search</button>
</form>
<?php
$conn = mysqli_connect("localhost", "username", "password", "database");
if (isset($_POST['submit'])) {
$search = mysqli_real_escape_string($conn, $_POST['search']);
$sql = "SELECT * FROM table_name WHERE column_name LIKE '%$search%'";
$result = mysqli_query($conn, $sql);
}
?>
<table>
<tr>
<th>Column 1</th>
<th>Column 2</th>
<th>Column 3</th>
</tr>
<?php while($row = mysqli_fetch_array($result)) { ?>
<tr>
<td><?php echo $row['column_1']; ?></td>
<td><?php echo $row['column_2']; ?></td>
<td><?php echo $row['column_3']; ?></td>
</tr>
<?php } ?>
</table>