- var_dump: documentation ( source)
<?php
$db = new stdClass;
$db->affected_rows = 1; //affected_rows is type int
echo '$db->affected_rows ';
var_dump($db->affected_rows);
echo 'empty($db->affected_rows) ';
var_dump(empty($db->affected_rows));
echo '$db->affected_rows > 0 ';
var_dump($db->affected_rows > 0);