PHP timestamp problems with a few small examples

<?php

Header ("Content-type:text/html;charset=utf-8");

Set Beijing time as the default time zone
Date_default_timezone_set (' PRC ');

Output Current Time

echo Date ("Y-m-d h:i:s", Time ()); 2018-01-30 10:30:32

Get a time stamp for the wee hours of the day

$today = Strtotime (Date ("y-m-d"), Time ());

Echo ' <br> ';

Echo $today; 1470844800

Echo ' <br> ';

Verify that the time stamp is correct early in the day

echo Date ("Y-m-d h:i:s", $today); 2016-08-11 00:00:00

Echo ' <br> ';

24-point timestamp of the day

$end = $today +6024;

Verify that the 24-point timestamp is correct on the day

echo Date ("Y-m-d h:i:s", $end); 2018-01-30 00:00:00

Echo ' <br> ';

Gets the timestamp of 0 points at the specified time

$time = Strtotime (' 2018-01-30 ');

Echo ' <br> ';

Echo $time; 1401984000

Echo ' <br> ';
Verifies whether the timestamp is a specified time
echo Date ("Y-m-d h:i:s", $time); 2018-01-30 00:00:00

?>

PHP timestamp problems with a few small examples