Replace date, gmdate, time, mktime, gmmktime with DateTime class

replace-date-time-mktime-with-datetime-class.php

<?php
// date
echo "date\n";
echo date('Y-m-d H:i:s'), "\n";

$dt = new DateTime();
echo $dt->format('Y-m-d H:i:s'), "\n\n";

// gmdate (UTC date)
echo "gmdate\n";
echo gmdate('Y-m-d H:i:s'), "\n";

$dt = new DateTime('now', new DateTimeZone('UTC'));
echo $dt->format('Y-m-d H:i:s'), "\n\n";

// time()
echo "time\n";
echo time(), "\n";

$dt = new DateTime();
echo $dt->getTimestamp(), "\n\n"; // or $dt->format('U')

// mktime()
echo "mktime\n";
$hour = 12;
$minute = 0;
$second = 0;
$year = 2020;
$month = 4;
$day = 1;
echo mktime($hour, $minute, $second, $month, $day, $year), "\n";

$dt = new DateTime();
$dt->setTime($hour, $minute, $second);
$dt->setDate($year, $month, $day);
echo $dt->getTimestamp(), "\n\n";

// gmmktime()
echo "gmmktime\n";
echo gmmktime($hour, $minute, $second, $month, $day, $year), "\n";

$dt = new DateTime('now', new DateTimeZone('UTC'));
$dt->setTime($hour, $minute, $second);
$dt->setDate($year, $month, $day);
echo $dt->getTimestamp(), "\n";