datetime from timestamp php code example
Example 1: php datetime object get unix timestamp
$date = new DateTime();
echo $date->getTimestamp();
Example 2: php datetime to timestamp
$time = '2021-03-31 23:59:00';
strtotime($time);
Example 3: php unix timestamp to date
$currentTime = DateTime::createFromFormat( 'U', $timestamp );
Example 4: php date object to timestamp
$date = new DateTime();
echo $date->getTimestamp();