// specify your own database credentials
private $host = "localhost";
private $db_name = "biodata";
private $username = "root";
private $password = "";
public $conn;

// get the database connection
public function getConnection(){

    $this->conn = null;

    try{
        $this->conn = new PDO("mysql:host=" . $this->host . ";dbname=" . $this->db_name, $this->username, $this->password);
    }catch(PDOException $exception){
        echo "Connection error: " . $exception->getMessage();
    }

    return $this->conn;
}

<?php
// Search from MySQL database table
$search= isset($_POST['search']) ? $_POST['search'] : '';
$query = $db->prepare("select from crudpdo2 where nt_pdo LIKE '%$search%' ORDER BY id_pdo");
$query->bindValue(1, "%$search%", PDO::PARAM_STR);
$query->execute();
// Display search result

if (!$query->rowCount() == 0) {

echo "Search found :<br/>";
echo "<table style="font-family:arial;color:#333333;">";
echo "<tr><td style="border-style:solid;border-width:1px;border-color:#98bf21;background:#98bf21;">Title Books</td><td style="border-style:solid;border-width:1px;border-color:#98bf21;background:#98bf21;">Author</td><td style="border-style:solid;border-width:1px;border-color:#98bf21;background:#98bf21;">Price</td></tr>";
while ($results = $query->fetch()) {
echo "<tr><td style="border-style:solid;border-width:1px;border-color:#98bf21;">";
echo $results['id_pdo'];
echo "</td><td style="border-style:solid;border-width:1px;border-color:#98bf21;">";
echo $results['nt_pdo'];
echo "</td><td style="border-style:solid;border-width:1px;border-color:#98bf21;">";
echo $results['nc_pdo'];
echo "</td></tr>";
        }
    echo "</table>";
    } else {
    echo 'Nothing found';
   }
?>