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PHP - How can I log in to my user?

I use the function to login.

But when I change the page from my site, I need to log in again.

How can I log in to my user when I change my page?

Here is my code:

<?php
error_reporting(0);
if($_POST['login']=="") {
?>
  <form method="POST" action="<?php echo $_SERVER['PHP_SELF']; ?>" >
    <label><a>Utilizador</a><input type="text" name="login" id="s-user"></label>
    <label><a>Senha</a><input type="text" name="password" id="s-pass"></label>
      <input type="submit" class="submit" value="Entrar">

  </form>


<?php
}
else {
?>
<?php
include("classes/Utilizadores/Cliente.class.php");


        if($_REQUEST['login']!="") {
            if($_REQUEST['password']!="") {

                            $clientes = new Cliente();
                            if($clientes->verificarCliente($_REQUEST['login'], $_REQUEST['password'])) {
                                echo "<br>";
                            } else {
                                echo "<br><a>Login ou senha errados, caso não tenha, <a href='criarconta.php'> registre-se</a>, <a>ou</a> <a href='index.php'>volte a tentar.</a></a><br>";
                            }
                            $clientes->endCliente();

            } else {
                echo "ERRO: Deve introduzir a sua password...<br>";
            }
        } else {
            echo "ERRO: Deve introduzir o seu login...<br>";
        }

}
?>

My function code:

function verificarCliente($login, $password) {
    $sql = "SELECT * FROM users WHERE login LIKE '$login' AND password LIKE '$password'";
    if(($rs=$this->bd->executarSQL($sql))){
        if(mysql_fetch_row($rs)==false) {
            return false;
        } else {

                                echo "<br><b> <a>Bem-Vindo <font size=2>" .mysql_result($rs,0,"login")."</font></b></a><br><br><br>";     

            return true;

        }
    }
    else {
        return false;
    }
}
+4
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3 answers

First of all, I highly recommend not using the LIKE operator, use the = operator instead. I would also recommend using parameterized queries. I would also recommend hashing your user passwords, adding them is also a very good idea.

Let these pages read. There is some good info here:

How can I prevent SQL injection in PHP?

Protected hash and salt for PHP passwords

crackstation.net .

:

function verificarCliente($login, $password) {

        $sql = "SELECT * FROM users WHERE login = '$login' AND password = '$password'";
        if(($rs=$this->bd->executarSQL($sql))){
            if(mysql_fetch_row($rs)==false) {
                return false;
            } else {
                session_start();
                $the_username = // grab the username from your results set  
                $_SESSION['username'] = $the_username; 

                // put other things in the session if you like
                echo "<br><b> <a>Bem-Vindo <font size=2>" .mysql_result($rs,0,"login")."</font></b></a><br><br><br>";     

                return true;

            }
        }
        else {
            return false;
        }
    }

,

session_start();
if (!isset($_SESSION['username']) || empty($_SESSION['username'])) {
      // redirect to your login page
      exit();
}

$username = $_SESSION['username'];
// serve the page normally.
+2

$_SESSION. http://www.php.net/manual/en/reserved.variables.session.php. , -.

:

1) , ​​ , , , ..

2) , $first_name, $last_name ..

3) :

$first_name = $_SESSION['first_name'];
$birthday = $_SESSION['birthday'];

session_destroy().

So $_SESSION['first_name'] , .

EDIT: php.net W3, .

+4

You are not saving user state. You must save the user state in the session and get on the next page.

Check out http://www.w3schools.com/php/php_sessions.asp

+2
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