- print_r: documentation ( source)
<?php
$a = new DateTime('2015-01-01', new DateTimeZone('UTC'));
$b = new DateTime('2015-01-01', new DateTimeZone('EET'));
if (is_object($a) &&
is_object($b) &&
$a == $b &&
print_r($a, true) != print_r($b, true)) {
echo 'Equals, but not equals?';
}