php get epoch time code example

Example 1: php start of day epoch

$beginOfDay = strtotime("today", $timestamp);
$endOfDay   = strtotime("tomorrow", $beginOfDay) - 1;

Example 2: time php

<?php 
/* Unix Timestamp */
$timestamp = time();
echo $timestamp . "<br>";
echo date("d/m/Y", $timestamp);
?>