what's the diff between using a class and not using a class?

[markthien]

hi guys,

 

  For instance, I got a login process like below:

 

login.php

------------------------------------------------------------------

<form id="login_form" action="process-login.php" method="post">

        <p>

        <label for="name">Username: </label>

            <input type="text" name="username" />

        </p>

       

        <p>

        <label for="pwd">Password: </label>

            <input type="password" name="pwd" />

        </p>

       

        <p>

        <input type="submit" id="submit" value="Login" name="submit" />

        </p>

</form>

 

then forward the request to process-login.php like below

-----------------------------------------------------------------

<?php

$con = null;

 

try {

$con = new PDO('mysql:host=localhost;dbname=abc', 'user1', 'password');

 

} catch(PDOException $e) {

error_log($e->getMessage());

}

 

$valid_user = false;

$username = $_POST['username']);

$password = $_POST['pwd']);

 

try {

$con->setAttribute( PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

$stmt = $con->prepare('select count(*) from user where username = :username and password = :password');

$stmt->execute(array('username' => $username , 'password' => md5($password)));

if($stmt->fetch()) {

$stmt->close();

$valid_user = true;

}

} catch(PDOException $e) {

error_log($e->getMessage());

}

 

if($valid_user){

  echo 'success';

} else {

  echo 'fail';

}

 

$con = null;

?>

 

versus forwarding to process-login.php like below

-----------------------------------------------------------------

<?php

 

session_start();

require_once 'classes/Membership.php';

$membership = new Membership();

 

if($_POST && !empty($_POST['username']) && !empty($_POST['pwd'])) {

$response = $membership->validate_User($_POST['username'], $_POST['pwd']);

}

 

if($response)

  echo 'success';

else

  echo 'fail';

 

?>

 

Membership.php

-----------------------------------------------------------------

 

<?php

 

require 'Mysql.php';

 

class Membership {

 

function validate_user($un, $pwd) {

$mysql = New Mysql();

$ensure_credentials = $mysql->verify_Username_and_Pass($un, md5($pwd));

 

if($ensure_credentials) {

$_SESSION['status'] = 'authorized';

header("location: index.php");

} else return "Please enter a correct username and password";

 

}

 

function log_User_Out() {

if(isset($_SESSION['status'])) {

unset($_SESSION['status']);

 

if(isset($_COOKIE[session_name()]))

setcookie(session_name(), '', time() - 1000);

session_destroy();

}

}

 

function confirm_Member() {

session_start();

if($_SESSION['status'] !='authorized') header("location: login.php");

}

 

}

?>

Mysql.php

-----------------------------------------------------------------

<?php

 

require_once 'includes/constants.php';

 

class Mysql {

private $con;

 

function __construct() {

try {

$this->$con = new PDO('mysql:host=localhost;dbname=abc', 'user1', 'password') or die('failed to connect to database');

$this->$con->setAttribute( PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

} catch(PDOException $e) {

error_log($e->getMessage());

}  

}

 

function verify_Username_and_Pass($username, $password) {

 

$stmt = $con->prepare('select count(*) from user where username = :username and password = :password');

$stmt->execute(array('username' => $username , 'password' => md5($password)));

if($stmt->fetch()) {

$stmt->close();

return true;

}

return false;

}

}

?>

 

What I mean is what is the different between using an OO way and a straight forward way?

 

thanks & regards,

Mark

[Mchl]

If your application is small, probably none. If it grows larger, object oriented code makes it easier to develop, maintain, modify etc. (if done properly that is)