如何通过日期确定星期几？

Question

I want to display a week by date:

   Mon           Tue           Wed           Thu          Fri
2011-12-12    2011-12-13    2011-12-14    2011-12-15   2011-12-16

For example, I have the date 2011-12-14. How do I determine which day of the week it is?

Answer 1

You can use strtotime() 's this week selector.

<?php
$ts_today = strtotime('2011-12-14');
$ts_firstDayOfWeek = strtotime('this week', $ts_today);

echo 'today: ', date('Y-m-d', $ts_today), "\n";
echo 'week start: ', date('Y-m-d', $ts_firstDayOfWeek), "\n";

prints

today: 2011-12-14
week start: 2011-12-12

Answer 2

date("l",strtotime("2011-12-14"));

在这里查看更多信息

Answer 3

date('N') gives you the day of the week , from there it's only a little bit of math:

$date = '2011-12-14';
$date = strtotime($date);
$date = strtotime('-' . (date('N',  $date) - 1) . ' days', $date);
echo date('Y-m-d', $date);

Answer 4

I think you are looking for

getdate(time_stamp);

you can access the day of the week by using the following.

$day = getdate(time_stamp);

echo $day['wday'];

note: this will return the day of the week as a number Sunday = 0 - Saturday = 6

more info > http://php.net/manual/en/function.getdate.php

Answer 5

$date = '2011/12/14';

$weekday = date('l', strtotime($date));
echo $weekday;

print the real day name.

Answer 6

string date ("l", strtotime("2011-12-12"));