This program is helps to get current month,date,week,time and year. php has some Inbuilt functions and those functions are used to find year, month, date, time.

<?php
date_default_timezone_set('UTC');
$mon = strtotime("last monday");
$mon = date('w', $mon)==date('w') ? $mon+7*86400 : $mon;
 
$sun = strtotime(date("Y-m-d",$mon)." +6 days");
 
$week_start = date("Y-m-d",$mon);
$week_end = date("Y-m-d",$sun);

echo date('l jS \of F Y h:i:s A');
echo "Current week starts from $week_start to $week_end ";

?>

Thursday 24th of August 2017 02:58:36 AM Current week starts from 2017-08-21 to 2017-08-27