date time to timestamp php

PHP
<?php 
echo date('m/d/Y H:i:s', 1541843467); 
?> $s = '06/10/2011 19:00:02';
$date = strtotime($s);
echo date('d/M/Y H:i:s', $date);
The above one is the one of the example of converting a string to date.
echo $s ->format('Y-m-d');
The above one is another method $date = new DateTime();
echo $date->getTimestamp();<?php
$date = new DateTime();
echo $date->format('U = Y-m-d H:i:s') . "\n";

$date->setTimestamp(1171502725);
echo $date->format('U = Y-m-d H:i:s') . "\n";
?>


Source

Also in PHP: