weird.php

<?php

class Object {

}


class Unit extends Object {

	public $me = null;

	public function __construct() {
		$this->me = new Me();
	}

	public function go() {
		Me::message();
	}

}


class Me extends Object {

	public function message() {
		$this->send("Hello world!");
	}

	public function send($msg) {
		echo $msg . PHP_EOL;
	}

}

$unit = new Unit();
$unit->go(); // Fatal error: Call to undefined method Unit::send() in /vagrant/apps/vitals/app/webroot/index.php on line 26