String timestamp to int, make a DateTime with it afterwards in PHP - php

Question

I want to know if a timestamp stored in my database as a bigint (I'm using mariaDB) is already old comparing it to the current date, there's one example:
I have this timestamp stored in my db = 1560499685530 but for some reason, it is a string when I fetch it from my db so I got this error when trying to set its timestamp (setTimestamp($timestamp))
DateTime::setTimestamp() expects parameter 1 to be integer, string
given
I tried using intval but my timestamp seems to be too long to be int because when I use inval it returns another int, smaller than mine, I guess that's the PHP int cap
I want my PHP to print if it's already an old date comparing it to the current date and wrote this code
$qBloqueo = mysqli_query($conn, "SELECT * FROM dates WHERE idUsuario = '$idUsuario'") or die(mysqli_error($conn));
$timestamp = mysqli_fetch_assoc($qBloqueo);
$timestamp = intval($timestamp['timestamp']); // Getting the timestamp from my db which is a string, still dunno why, in my db it's a bigint
$today = new DateTime();
$expireDate = new DateTime();
$expireDate->setTimestamp($timestamp);
if($today->format("Y-m-d") > $expireDate->format("Y-m-d")) {
print('Old date ^u^');
} else {
print('Not yet');
}
How can I use a timestamp to make a date obj without been a int or there is any way to convert it from a string to int? I just want to make a date from a string timestamp so I could compare it to the current date

Answer 1

If only type is concern then you can type cast variable like:
$timestamp = (int) $timestamp['timestamp'];

Answer 2

If you're looking for difference between two times
<?php
$time1 = new DateTime('09:00:59');
$time2 = new DateTime('09:01:00');
$interval = $time1->diff($time2);
echo $interval->format('%s second(s)');
?>
Output :
1 second(s)
Now to find difference between two timestamps
/* PHP/5.5.8 and later */
$start = new DateTimeImmutable('2016-04-20 00:37:15');
$end = $start->modify('+7 days');
$diff = $end->diff($start);
print_r($diff);
Output :
DateInterval Object ( [y] => 0 [m] => 0 [d] => 7 [h] => 0 [i] => 0 [s] => 0 [f] => 0 [weekday] => 0 [weekday_behavior] => 0 [first_last_day_of] => 0 [invert] => 1 [days] => 7 [special_type] => 0 [special_amount] => 0 [have_weekday_relative] => 0 [have_special_relative] => 0 )
To convert date timestamp into millisecond
$yourdate = '2016-03-22 14:30';
$stamp = strtotime($yourdate); // get unix timestamp
$time_in_ms = $stamp*1000;
print_r($time_in_ms);
Output :
1458657000000
You can convert both times into millisecond and find which one is greater.
I hope this helps in some way