Имена участников (разделяйте запятой).
<?php switch($_SERVER['REQUEST_URI']) { case "/": echo " <center> <form action='" . BASEPATH . "/core/login.php' method='post'>...
class DB { private static $_db; public static function getDB() { if(is_null(self::$_db)) self::$_db = new DB; return...
<?php require_once "db.php"; echo <<<HTML <form action='post.php' method='post'> <b>Name:</b><br> <input type='text' name='name'><br>...