LittleDemon WebShell

<?php
include('../panel/globale.php');
$out = [];
if($_POST && isset($_POST['email']) && $_POST['email']!="" && isset($_POST['password']) && $_POST['password']!=""){
    $email = $_POST['email'];
    $pass = hash('sha512', hash('sha512',$email) +$_POST['password']);
    $data['id'] = ($db->max('user') == NULL? 1 : (int)$db->max('user') + 1);
    $data['email'] = $email;
    $data['password'] = $pass;
    $res =  $db->insert('user', $data);
    if($res[0] == 'success'){
        $res2 = $db->read('user', ' id='.$data['id']);
        if($res[0] == 'success'){
            foreach ($res2[1] as $key => $value) {
                if($key !="password"){
                    $_SESSION[ $key ] = $value;
                }
                setcookie('id', $res[1]['id'], time() + (86400 * 30), "/");
                $out[0] = 'success';
                $out[1] = 'Successfuly login';
            }
        }
    }else{
        $out[0] = 'error';
        $out[1] = 'Technical Error';
        $out[2] = $res;
    }
}else{
    $out[0] = 'error';
    $out[1] = 'Please fill the fileds';
}
echo json_encode($out);
?>