How to determine the day of the week a date is in php

php method to determine the day of the week a date is: You can use the date() function to determine. The date() function can format the timestamp into a more readable date and time. The specific usage method is: [date('l', strtotime('2019-4-6'));].

The PHP date() function formats a timestamp into a more readable date and time.

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Syntax:

string date ( string $format [, int $timestamp ] )

Parameters:

• format Required. Specifies the format of the timestamp

• timestamp Optional. Specify timestamp. The default is the current date and time

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Code implementation:

1 , date('l'), obtains the English day of the week. Sunday to Saturday

date('l', strtotime('2019-4-6')); // Saturday

2, date('D'), get the first three letters of the English alphabet. Mon to Sun

date('D', strtotime('2019-4-6')); // Sat

3, date('w'), what is obtained is a number, 0 (meaning Sunday) to 6 (meaning Saturday)

date('w', strtotime('2019-4-6')); // 6

4, date('N') , obtains the day of the week represented by numbers in ISO-8601 format (newly added in PHP 5.1.0), 1 (meaning Monday) to 7 (meaning Sunday)

date('N', strtotime('2019-4-6')); // 6

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