<?php
    session_start();
    $err = "";
    if($_GET['user']==null){
        header("Location:login.php?err=1");
    }
    if($_GET['user']!=null){
        $flag = false;
        $temp = $_GET['user'];
        $count = count($_SESSION['user']);
        for ($i=0;$i<$count;$i++){
            if($_SESSION['user'][$i]==$temp){
                $flag = true;
            }
        }
    if($flag==false){
        header("Location:login.php?err=1");
    }
}
    $user = $_GET['user'];
    $fn = $_SESSION['fn'][$user];
    $ln = $_SESSION['ln'][$user];
    $ad = $_SESSION['ad'][$user];
    $pass = $_SESSION['password'][$user];
    $cpass = $_SESSION['password'][$user];
    if(isset($_POST['btnBack'])){
        header("Location:home.php?user=$user");
    }
    if(isset($_POST['btnSave'])){
        if (!empty($fn)&&!empty($ln)&&!empty($ad)&&!empty($user)&&!empty($pass)&&!empty($cpass)){
            if($_POST['pass']==$_POST['cpass']){
                    unset($_SESSION['user'][$user]);
                    unset($_SESSION['password'][$user]);
                    unset($_SESSION['fn'][$user]);
                    unset($_SESSION['ln'][$user]);
                    unset($_SESSION['ad'][$user]);
                    $user = $_POST['user'];
                    $_SESSION['user'][] = $_POST['user'];
                    $_SESSION['password'][$user] = $_POST['pass'];
                    $_SESSION['fn'][$user] = $_POST['fn'];
                    $_SESSION['ln'][$user] = $_POST['ln'];
                    $_SESSION['ad'][$user] = $_POST['ad'];
                    $err = "Berhasil Dirubah!";
                    header("Location:profile.php?user=$user");
            }
            else{
                $err = "Password harus sama!";
            }
        }else {
            $err = "Field Harus Terisi!";
        }
    }
?>
<h1>Profile</h1>
<form action="#" method="post">
    First Name: <input type="text" name="fn" value="<?= $_SESSION['fn'][$user] ?>"><br>
    Last Name: <input type="text" name="ln" value="<?= $_SESSION['ln'][$user] ?>"><br>
    Address: <input type="text" name="ad" value="<?= $_SESSION['ad'][$user] ?>"><br>
    Username: <input type="text" name="user" value="<?= $user ?>"><br>
    Password: <input type="password" name="pass" value="<?= $_SESSION['password'][$user] ?>"><br>
    Confirm Password: <input type="password" name="cpass" value="<?= $_SESSION['password'][$user] ?>"><br>
    <input type="submit" name="btnSave" value="Save">
    <input type="submit" name="btnBack" value="Back">
    <p><?= $err ?></p>
</form>