<?php

class Note {
	public $db = null;
	public $email = '';
	public $password = '';
	public $id = 0;

	function __construct() {
		require_once 'db-connect.inc.php';
		$this->db = Database::ConnectDb();
	}
}

?>
<?php

class Note {
	public $db = null;
	public $email = '';
	public $password = '';
	public $id = 0;

	public function __construct() {
		require_once 'db-connect.inc.php';
		$this->db = Database::ConnectDb();
		echo 'Note created!';
	}
}

?>
--- 
+++ 
@@ -6,10 +6,9 @@
 	public $password = '';
 	public $id = 0;
 
-	public function __construct() {
+	function __construct() {
 		require_once 'db-connect.inc.php';
 		$this->db = Database::ConnectDb();
-		echo 'Note created!';
 	}
 }
 
Remove the echo when the constructor is called.
