empty() Testing

emptytests.php

<?php
$nlbr = "<br />\n";

$x = new stdClass();
$x->dog = "";
$x->cat = array();
$x->snake = new stdClass();
$x->mouse = FALSE;
$x->pig = TRUE;
$x->turtle = 0;
$x->horse = 1;
$x->owl = "Hoot";

echo (empty($x->frog)) ? "No frog." . $nlbr : "Frog" . $nlbr;
echo (empty($x->dog)) ? "No dog." . $nlbr : "Dog" . $nlbr;
echo (empty($x->cat)) ? "No cat." . $nlbr : "Cat" . $nlbr;
echo (empty($x->snake)) ? "No snake." . $nlbr : "Snake" . $nlbr;
echo (empty($x->mouse)) ? "No mouse." . $nlbr : "Mouse" . $nlbr;
echo (empty($x->pig)) ? "No pig." . $nlbr : "Pig" . $nlbr;
echo (empty($x->turtle)) ? "No turtle." . $nlbr : "Turtle" . $nlbr;
echo (empty($x->horse)) ? "No horse." . $nlbr : "Horse" . $nlbr;
echo (empty($x->owl)) ? "No owl." . $nlbr : "Owl" . $nlbr;