The actual page is really just HTML - the PHP is the programming part - (handling the logins, and using the functions within threads).
If you wanted to make a php page:
<?
echo <<<OUTPUT
Put your HTML here
OUTPUT;
?>
Is all you'd need - the PHP part depends on what exactly you want the page to do.

it's a scripting language - and there's no way to WYSIWYG scripting. But everything that the user sees is just HTML.