Php5 -> php7

class MysqlConnect
{
  private $host;
  private $user;
  private $password;
  private $dbname;
  private $message;
  
  public function __construct($Host, $User, $Password, $DbName)
    {
      $this->host = $Host;
      $this->user = $User;
      $this->password = $Password;
      $this->dbname = $DbName;
      $this->Connect();
      $this->SelectDB();
    }
    
  public function __destruct()
    {
      $this->CloseConnect();
    }
    
  private function CloseConnect()
    {
      mysql_close();
    }
        
  private function Connect()
    {
      if(mysql_connect($this->host, $this->user, $this->password))
        return true;
      else
        return false;
    }
    
  private function SelectDB()
    {
      if(mysql_select_db($this->dbname))
        return true;
      else
        return false;
    }
 
}

require_once('include/db.php');
session_start();
include('include/config.php');
$page = $_GET['p'];
$dbconnect = new MysqlConnect($Host, $User, $Password, $DbName);
$Pages = new Pages($page);
mysql_query("SET NAMES 'utf8'");
mysql_query("SET CHARACTER SET 'utf8'");

$link = mysqli_connect('server', 'user', 'password', 'db');
mysqli_query($link, $sql)

ini_set('display_errors', 'On');
error_reporting(E_ALL);