Just noticed that sad() is not called on a class instance

sad.php

<?php
$thefeels = new Feelings();
function sad() {
	global $thefeels;
    return $thefeels->is_checked() ? $thefeels : $thefeels->is_sad();
}
class Feelings {
  private $sad = true;
  private $feelings_checked = false;
  public function is_sad() {
    $this->feelings_checked = true;
    return $this->sad;
  }
  
  public function is_checked() {
    return $this->feelings_checked;
  }
  public function stop() {
    $this->sad = false;
  }
}
function beAwesome() {
  // TODO: own version
}