将数据插入数据库php错误

Question

Be kind, I am still learning, I have made this code but it didn't work, I have tried everything, it is suppose to when an user is logged in and someone send an image the member name is recorded at the database:

if (!isset($_SESSION[sforum_.'sforum_logged_in']));

  if(isset($_SESSION[sforum_.'sforum_user_username'])) {
         mysqli_query(INSERT INTO media (membro) VALUES ('$_SESSION[sforum_.'sforum_user_username']'));
      } else {
         Echo "erro"; 
  } 

It gives an error:

Parse error: syntax error, unexpected T_STRING

Answer 1

Try this code

<?php
    if (!isset($_SESSION[sforum_ . 'sforum_logged_in'])) {
        if (isset($_SESSION[sforum_ . 'sforum_user_username'])) {
            mysqli_query("INSERT INTO media (membro) VALUES ('" . $_SESSION[sforum_ . 'sforum_user_username'] . "')");
        } else {
            echo "error";
        }
    }
?>