WordPress is_user_logged_in failing with HTML Scripting

Question

Could someone please review why this below added code won't execute correctly? I've escaped the PHP scripting to display the HTML content in WordPress, but I can't get this thing to work!

The results are that, whether the user is logged in or not, the HTML content displays for everything. Strangely, though, I can't get the else { ... } part to render in HTML. I'm not too good with PHP, so please mind if I done something incorrectly.

I've tried debugging via NetBeans, but the IDE failed to detect anything on a fail-safe conditioning.

<?php
    if ( is_user_logged_in() ) { 
?>
        <h2>Welcome to the Portal!</h2>
        <p>Here you can manage all information with an authorised account. You can click on the button below to create a new entry.</p>
        <button type="button" href="#" onClick="document.location = 'http://www.example.com'">Add Entry</button>
<?php 
    } else { 
        echo "<h1>Unauthorised!</h1>";
        echo "<javascript>document.location = \'http://example.com\'";
        exit;
    };
?>

Answer 1

Alright, so I got the coding going. It turned out that, by default, WordPress didn't allow PHP execution in my pages. I installed a plugin named "insert PHP", modified the code to mix html and php and it worked!

[insert_php]
if (is_user_logged_in()){
echo "<h2>Welcome to the Portal!</h2>";
echo "<p>Here you can manage all entries with an authorised account. You can click on the button below to create an entry.</p>";
echo '<button type="button" onClick="document.location = \'http://somesite.com\'">Add Listing</button>';
} else {
echo '<h2>Unauthorized 401</h2>';
echo '<script>document.location = \'http://domain.tld'</script>';
};
[/insert_php]