[Kyttias]

Try:

PHP Code:

$pm = new PrivateMessage(); 
$pm->setsender('SYSTEM'); // Or... whatever? You can change this.
$pm->setrecipient(htmlentities(addslashes(trim($recipient->username))));
$pm->setmessage("Donation For You!", "{$mysidia->user->username} has sent you {$amount} {$mysidia->settings->cost}!");
$pm->post(); 


You could probably also have the sender be the user?

PHP Code:

$pm->setsender($mysidia->user->username); 


Here's the whole donate.php with the addition:

  Spoiler: donate.php 

PHP Code:

<?php

use Resource\Native\Integer;
use Resource\Native\String;

class DonateController extends AppController{

    public function __construct(){
        parent::__construct("member");
    }
    
    public function index(){
        $mysidia = Registry::get("mysidia");        
        if($mysidia->input->post("recipient") and $mysidia->input->post("amount")){
            $recipient = preg_replace("/[^a-zA-Z0-9\\040]/", "", $mysidia->input->post("recipient"));
            $amount = $mysidia->input->post("amount");
            $recipient = new Member($recipient);            
             if($amount < 0) throw new DonationException("negative");
            elseif($mysidia->user->money < $amount) throw new DonationException("funds");
            elseif($recipient->username == $mysidia->user->username) throw new DonationException("user");
            else{
                $mysidia->user->donate($recipient, $amount);
                $this->setField("recipient", new String($recipient->username));
                $this->setField("amount", new Integer($amount));

                $pm = new PrivateMessage(); 
                $pm->setsender('SYSTEM'); // Or... whatever? You can change this.
                $pm->setrecipient(htmlentities(addslashes(trim($recipient->username))));
                $pm->setmessage("Donation Acquired", "{$mysidia->user->username} has sent you {$amount} {$mysidia->settings->cost}!");
                $pm->post();  
                
            }    
            return;
        }
    }
}
?>

Untested, of course. Luckily it appears to be super simple to implement notifications via PM!