[PHP] pobierz, plaintext 
if(isset($_SESSION['logged']))
{
 echo 'JuĹź jestes zalogowany!';
}
else
{
    echo '<form action="index.php" method="POST">
    E-mail: <br />
    <input type="text" name="lfmail"><br />
    Hasło: <br />
    <input type="password" name="lfpass"><br />
    <input type="submit" name="fok" value="Zaloguj">
    </form>';
     if(isset($_POST['fok']))
     {
        $lfmail = trim($_POST['lfmail']);
        $lfpass = trim($_POST['lfpass']);
        if(empty($lfmail) || empty($lfpass)) echo 'Wpisz wszystkie pola!';
        else
        {
            $lfmail = strip_tags( mysql_real_escape_string( HTMLSpecialChars($lfmail)));
            $lfpass = strip_tags( mysql_real_escape_string( HTMLSpecialChars($lfpass)));
            $lfpass = md5($lfpass);
            $lfresult = mysql_query("SELECT * FROM firmy WHERE email='$lfmail' AND pass='$lfpass'");
            if(mysql_num_rows($lfresult)==0) echo 'Niestety podałes niepoprawne dane!';
            else
            {
                $row = mysql_fetch_array($lfresult);
                $_SESSION['logged'] = true;
                $_SESSION['id'] = $row['id'];
                $_SESSION['firma'] = 1;
                header( 'Location: <a href="http://localhost/portal/pro.php'" target="_blank">http://localhost/portal/pro.php'</a> ) ;
                }
            }
        }
    }
[PHP] pobierz, plaintext