Php checks the instance code for the day of the week

In the date field of the php date function, w represents the number of weeks.

W represents: 0 SUNDAY 1 Monday 2 Tuesday... 6. Saturday

Therefore, if we judge the day of the week:

The code is as follows:	Copy code
$ W = date ('w '); // Note that all the numbers returned above are 0123456. Therefore, if you want to display the week in Chinese, you can define the following array. $ Weekarray = array ("day", "one", "two", "three", "four", "five", "six"); // 0 indicates Sunday Echo 'week'. $ weekarray [$ w];

The format of day is

The code is as follows:	Copy code
Date ('W', unix time in milliseconds) Echo date ('W', strtotime ('2017-05-09 12:23:30 '));