php comparing dates for day change - php

Question

I have found hundreds of questions and answers for topics SIMILAR to this on SO, however, none match my needs specifically and I am stumped.
I have a variable in y-m-d format and I need to see if it was created on the previous calendar day (not 24 hours previous, but on the previoous calendar day).
ie.
$tDate = '12-05-2';
If object created May 2, 2012 at 11:59pm(stored time) I need a comparison to May 3, 2012 12:01 am(current time) to equal true.
If object created May 2, 2012 at 11:51pm(stored time) I need a comparison to May 2, 2012 11:58pm(current time) to equal false.
I know if these were stored in a MySQL db and pulled from a field, MySQL could figure that out easily. In this case, however, that solution is not an option.
This comparison must be done entirely in php.
I know it's an eccentric question, but hey, that's what the guru's at StackOverflow excel at! Looking forward to seeing the replies!
UPDATE
Figured this out as:
$dTest = '12-05-02';
$dTest = explode('-',$dTest);
$dTest2 = date('y-m-d');
$dTest2 = explode('-',$dTest2);
if ($dTest[2]<$dTest2[2]){
echo '<br />Posted Yesterday<br />';
} else {
echo '<br />Posted Today<br />';
}
Is there a more efficient solution? Seems to work, but I figure there must be a more optimal/elegant solution?
SOLVED
$tHolder = '12-05-12';
$voteDate = date("y-m-d", strtotime($tHolder));
$today = date("y-m-d", strtotime("today"));
if ($voteDate === $today)
{
echo "this was today's post";
}
elseif ($voteDate < $today)
{
echo "this was previous to today";
}

Answer 1

Firstly - I dont think your "solutions" works. What happens when todays date is 12-06-01 and the post was on 12-05-31 - it will give the wrong answer because "31" > "1"
Anyway - I think the correct answer is:
$yesterday =date("y-m-d", strtotime("yesterday"));
$today = date("y-m-d", strtotime("today"));
if ($yesterday === $tDate)
{
echo "this was yesterdays post";
}
elseif ($today === $tDate)
{
echo "this was todays post";
}
else
{
echo "this was NOT yesterday or today":
}

Answer 2

You can convert both dates to UNIX time and then compare it as integers:
$day_start = strtotime('-1 day', mktime(0, 0, 0);
$day_finish = strtotime('-1 day', mktime(23, 59, 59);
$dT = strtotime('-1 day', $dTime)
if($dT > $day_start && $dT < $day_finish) {
var_dump($dT);
} else {
exit;
}

Answer 3

If you're actually looking for "Posted X days ago":
$datetime1 = new DateTime('2012-05-01');
$datetime2 = new DateTime('2012-05-02');
$interval = (int)$datetime1->diff($datetime2)->format('%a');
switch ($interval) {
case 0:
echo "Posted Today<br />";
break;
case 1:
echo "Posted $interval day ago<br />";
break;
default:
echo "Posted $interval days ago<br />";
}