Timestamps in PHP

<?php
echo date('h:i:s a', time() + 5 * 3600).'<br/>'; // added 5 hours to current time
echo date('h:i:s a', strtotime('5 hours')).'<br/>'; // added 5 hours to current time

$timestamp = mktime(0, 40, 30, 2, 11, 95); // made own time
echo 'Time: '.date('h:i:sa', $timestamp).'<br/>'; // Time: 12:40:30am
echo 'Date: '.date('d/m/Y', $timestamp).'<br/>'; // Date: 11/02/1995

$timestamp = mktime(12, 40, 30, 2, 11, 95);
echo 'Time: '.date('h:i:sa', $timestamp).'<br/>'; // Time: 12:40:30pm

$timestamp = mktime(13, 40, 30, 2, 11, 95);
echo 'Time: '.date('h:i:sa', $timestamp).'<br/>'; // Time: 01:40:30pm
?>

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