///classes .....................
<?php
class saveusers
{
        protected $name;
        protected $message;
        protected $password;
        protected $id;


    public function saveuUserInfo()
    {
            $name =$this->getName();
            $message=$this->getMessage();
            $password=$this->getPassword();
            $connect= new connect();
            $mysql=$connect->getconnection();
            $query = "insert into users(name,message,password) values('$name','$message','$password')";
            //die($query);
            mysqli_query( $mysql,$query);
    }
    public function updateuser()
    {
        $name =$this->getName();
        $message=$this->getMessage();
        $password=$this->getPassword();
        $connect= new connect();
        $mysql=$connect->getconnection();
        $query = "update users set name='$name',message='$message',password='$password' where id=".$this->getId();
//        die($query);
        mysqli_query( $mysql,$query);
    }
    public function deletedata()
    {
        $connect= new connect();
        $mysql=$connect->getconnection();
        $query="delete from users where id=".$this->getId();
        mysqli_query($mysql,$query);
    }

    /**
     * @return mixed
     */
    public function getId()
    {
        return $this->id;
    }

    /**
     * @param mixed $id
     */
    public function setId($id)
    {
        $this->id = $id;
    }

    /**
     * @return mixed
     */
    public function getName()
    {
        return $this->name;
    }

    /**
     * @param mixed $name
     */
    public function setName($name)
    {
        $this->name = $name;
    }

    /**
     * @return mixed
     */
    public function getMessage()
    {
        return $this->message;
    }

    /**
     * @param mixed $message
     */
    public function setMessage($message)
    {
        $this->message = $message;
    }

    /**
     * @return mixed
     */
    public function getPassword()
    {
        return $this->password;
    }

    /**
     * @param mixed $password
     */
    public function setPassword($password)
    {
        $this->password = $password;
    }
}

  next class.......................
  <?php

/**
 * Created by PhpStorm.
 * User: Rabin
 * Date: 1/17/2017
 * Time: 7:36 PM
 */
class showusers extends connect
{
    protected $table;
    protected $id;
    public function getdata()
    {
      $connect=new self();
      $mysql=$connect->getconnection();
      $query='select * from '.$this->getTable();
      $result= mysqli_query($mysql,$query);
      $users=[];
      while ($row=mysqli_fetch_assoc($result))
      {
        $data=new saveusers();
        $data->setName($row['name']);
        $data->setPassword($row['password']);
        $data->setMessage($row['message']);
        $data->setId($row['id']);
        $users[]=$data;
      }
      //var_dump($data);
      return $users;
    }
    public function showuserinfo()
    {
     $connect=new connect();
     $mysql=$connect->getconnection();
     $query="select * from users where id=".$this->getId();
     $result=mysqli_query($mysql,$query);
     $row=mysqli_fetch_assoc($result);
     $data=new saveusers();
     $data->setName($row['name']);
     $data->setPassword($row['password']);
     $data->setMessage($row['message']);
     $data->setId($row['id']);
//     echo "<pre>";
//     var_dump($data);
//     die;
     return $data;
    }

    /**
     * @return mixed
     */
    public function getId()
    {
        return $this->id;
    }

    /**
     * @param mixed $id
     */
    public function setId($id)
    {
        $this->id = $id;
    }

    public function getTable()
    {
        return $this->table;
    }

    /**
     * @param mixed $table
     */
    public function setTable($table)
    {
        $this->table = $table;
    }

}

 next classs........................... for connection

 <?php

class connect
{
    protected $host;
    protected $user;
    protected $password;
    protected $database;

    public function getconnection()
    {
        $this->setHost('localhost');
        $this->setUser('root');
        $this->setPassword('');
        $this->setDatabase('leapfrog');
        return mysqli_connect($this->host,$this->user,$this->password,$this->database);
    }

    /**
     * @return mixed
     */
    public function getHost()
    {
        return $this->host;
    }

    /**
     * @param mixed $host
     */
    public function setHost($host)
    {
        $this->host = $host;
    }

    /**
     * @return mixed
     */
    public function getUser()
    {
        return $this->user;
    }

    /**
     * @param mixed $user
     */
    public function setUser($user)
    {
        $this->user = $user;
    }

    /**
     * @return mixed
     */
    public function getPassword()
    {
        return $this->password;
    }

    /**
     * @param mixed $password
     */
    public function setPassword($password)
    {
        $this->password = $password;
    }

    /**
     * @return mixed
     */
    public function getDatabase()
    {
        return $this->database;
    }

    /**
     * @param mixed $database
     */
    public function setDatabase($database)
    {
        $this->database = $database;
    }
}


  .................for saving and listing data ..........................

  <html>
<head>
    <title> display </title>
    <link rel="stylesheet" href="css/bootstrap.css">
</head>
<body>
<?php
include  'vendor/autoload.php';
..............save data.................
if (isset($_POST['save'])) {
$user = new saveusers();
$user->setName($_POST['name']);
$user->setPassword($_POST['password']);
$user->setMessage($_POST['message']);
$user->saveuUserInfo();
}
..............show data............

$show=new showusers();
$show->setTable('users');
$result=$show->getdata();
//echo "<pre>";
//var_dump($result);
//die;
//echo "<pre>";
//var_dump($result);
?>
<div class="container">
    <table class="table-condensed table-bordered table-hover">
            <tr>
                <td>Name</td>
                <td>Password</td>
                <td>Message</td>
            </tr>
            <?php foreach ($result as $data ){ ?>
            <tr>
                <td><?php echo $data->getname(); ?></td>
                <td><?php echo $data->getpassword();?></td>
                <td><?php echo $data->getMessage();?></td>
                <td>
                    <div class="form-group" >
                        <a href="delete.php?id=<?php echo $data->getid();?>" class="btn btn-info">Delete</a>
                    </div>
                </td><td>
                    <div class="form-group" >
                        <a href="update.php?id=<?php echo  $data->getid();?>" class="btn btn-info"> Update</a>
                    </div>
                </td>
                <?php } ?>
            </tr>
    </table>
</div>
<?php
?>
</body>
</html>

......................for deleting data.......................

<?php
include  'vendor/autoload.php';
$user=new saveusers();
$user->setid($_GET['id']);
$user->deletedata();
header('location:save.php');

...............for updating data ..............................
...............showing data for update........
<?php
include 'vendor/autoload.php';
$show=new showusers();
$show->setId($_GET['id']);
$row=$show->showuserinfo();
//echo "<pre>";
//var_dump($row);
//die;
if (!empty($row)){
    ?>
    <html>
    <head>
        <title>Form</title>
        <link rel="stylesheet" href="css/bootstrap.css">
    </head>
    <body>
    <div class="container">
        <div class="row">
            <h1>Form</h1>
            <form action="saveupdate.php" class="form" method="get">
                <div class="form-group">
                    <label for="name">Name</label>
                    <input type="text" name="name"class="form-control" value="<?php echo $row->getName(); ?>">
                </div>
                <div class="form-group">
                    <label for="password">Password</label>
                    <input type="password" name="password" class="form-control" value="<?php echo $row->getPassword();?>">
            </div>
            <div class="form-group">
                    <label for="message">Message</label>
                    <textarea name="message" id="" cols="30" rows="10" class="form-control"><?php echo $row->getMessage(); ?></textarea>
                </div>
                <div class="form-group" >
                    <input name="id" type="hidden" value="<?php echo $row->getId(); ?>"/>
                    <button class="btn btn-info" name="update" >Update</button>
                </div>
            </form>
        </div>
    </div>
    </body>
    </html>
<?php } ?>

....................update ...............

<?php
include 'vendor/autoload.php';
$update=new saveusers();
$update->setId($_GET['id']);
$update->setName($_GET['name']);
$update->setMessage($_GET['message']);
$update->setPassword($_GET['password']);
$update->updateuser();
header('location:save.php');