PHP gets the start and end dates for this week and last week

Recently, I used PHP to get the current week and last week's start date and end date because of the work. Search the Internet, there is no suitable, so I did a summary. The specific content and code are as follows.

<?php
header (' content-type:text/html; Charset=utf-8 ');

$date =date (' y-m-d ');  The current date

$first =1;//$first =1 indicates that weekly Monday is the start date 0 for each Sunday as the start date

$w =date (' W ', Strtotime ($date));  Gets the day of the current week Sunday is 0 weeks one to Saturday is 1-6 

$now _start=date (' y-m-d ', Strtotime ("$date-". $w? $w-$first: 6). ' Days '); Get the start date for this week, if $w is 0, Sunday, minus 6 days

$now _end=date (' y-m-d ', Strtotime ("$now _start +6"));  This week's end date

$last _start=date (' y-m-d ', Strtotime ("$now _start-7 Days"));  Last week's start date

$last _end=date (' y-m-d ', Strtotime ("$now _start-1 Days"));  Last week's end date

Echo ' This week's start date: ', $now _start, ' <br/> ';
Echo ' This week's End date: ', $now _end, ' <br/> ';
Echo ' last week's start date: ', $last _start, ' <br/> ';
Echo ' Last week's End date: ', $last _end, ' <br/> ';

Note: Since the foreign week is from Sunday onwards, China's custom from Monday onwards, so the direct use of Strtotime ("last Monday") will have the wrong results.

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