convert timestamp to unix code example

Example 1: from datetime to unix timestamp

import time
import datetime
d = datetime.date(2015,1,5)

unixtime = time.mktime(d.timetuple())
unixtime

Example 2: epoch

Epoch timestamp is a unit of measurement for time. It is the number of
seconds elapsed since the countdown has started. 

Beginning epochs per system:
macOS - January 1, 1904
Windows - January 1, 1601
Unix - January 1, 1970

Example 3: transform unix timestamp in date

//Our date string. The format is Y-m-d H:i:s
$date = '2019-04-01 10:32:00';

//Convert it into a Unix timestamp using strtotime.
$timestamp = strtotime($date);

//Print it out.
echo $timestamp;