Div not showing in wordpress - php

Question

<?php
if (is_user_logged_in()) {
echo '<div id="signin-box"> ' . wp_login_form() . ' </div>';
} else {
echo 'hi';
}
?>
Is what I've got. The login form is working, but it is not being wrapped in the div. Without the else/if statement, it works.

Answer 1

Does this work for you?
<?php
if (is_user_logged_in()) {
?>
<div id="signin-box">
<?= wp_login_form(); ?>
</div>
<?php
} else {
echo 'hi';
}
?>

Answer 2

http://codex.wordpress.org/Function_Reference/is_user_logged_in states it returns true if logged in and false if not.
You are probably looking for:
if(!is_user_logged_in()){
echo '<div id="signin-box">' . wp_login_form(array('echo' => false)) . '</div>';
}else{
echo 'hi';
}
Adding ! inverses true to false so if user is not logged in show login form else say hi. Also adding array('echo' => false) will give a return instead of echoing, removing array('echo' => false) you'll have to put wp_login_form() on its own line without a echo:
if(!is_user_logged_in()){
echo '<div id="signin-box">';
wp_login_form();
echo '</div>';
}else{
echo 'hi';
}

Answer 3

You want to add this code it seems work like this please add this code and check it.
<?php
if (is_user_logged_in()) { ?>
<div id="signin-box" class="test"><?php wp_login_form()?> </div>
<?php } else {
echo 'hi';
}
?>
In your code "echo" is not working in login form ..