PHP time function application

<?php
header('Content-Type: text/html; charset=utf-8');

//PHP timestamp function to get the unix timestamp of the specified date
echo strtotime('2018-1-19').PHP_EOL;
echo time().PHP_EOL;

//PHP timestamp function to get English text date and time
echo date('Y-m-d H:i:s', 1516291200).PHP_EOL;
echo date('Y-m-d H:i:s', time()).PHP_EOL;

//print the timestamp of this time tomorrow
echo date('Y-m-d H:i:s',strtotime('+1 day')).PHP_EOL;

//print the timestamp of this time yesterday
echo date('Y-m-d H:i:s',strtotime('-1 day')).PHP_EOL;

//print the timestamp of this time next week
echo date('Y-m-d H:i:s',strtotime('+1 week')).PHP_EOL;

//print the timestamp of this time last week
echo date('Y-m-d H:i:s',strtotime('-1 week')).PHP_EOL;

//Print the timestamp specifying the next day of the week
echo date('Y-m-d H:i:s',strtotime('next Thursday')).PHP_EOL;

//Print the timestamp of the specified day of the week
echo date('Y-m-d H:i:s',strtotime('last Thursday')).PHP_EOL;

//Timestamp to get the year, month, day, hour, minute and second
$datetimeArr = getdate(1516329995);
$hours = $datetimeArr["hours"];
$minutes = $datetimeArr["minutes"];
$seconds = $datetimeArr["seconds"];
$month = $datetimeArr["mon"];
$day = $datetimeArr["mday"];
$year = $datetimeArr["year"];
echo "year:$year\nmonth:$month\nday:$day\nhour:$hours\nminutes:$minutes\nseconds:$seconds\n";

// Date time intercepts year month day
$datetime = date('Y-m-d H:i:s', 151641111119);
echo ((int)substr($datetime,0,4)).PHP_EOL;;//Get the year
echo ((int)substr($datetime,5,2)).PHP_EOL;;//Get the month
echo ((int)substr($datetime,8,2)).PHP_EOL;;//Get the date

 

Effect picture: