One of those classes is DateTime class which solves date time related issues. If you omit the second argument, it returns the current date/time in the given format. 'U' => 'Week number of the given year, starting with the first Sunday as the first week', 'V' => 'ISO-8601:1988 week number of the given year, starting with the first week of the year with at least 4 weekdays, with Monday being the start of the week', Write a PHP function to get start and end date of a week (by week number) of a particular year. Definition and Usage. The WEEKNUM function starts counting with the week that contains January 1. The code below adds two new functions to the Date object. PHP date: Exercise-17 with Solution. The PHP mktime() function returns the Unix timestamp for a date. We converted our date string into a unix timestamp using PHP’s strtotime function. Day 1 of next week is 10 Oct 2016 Today is Sun 2 Oct 2016, day 7 of this week. The date_add() function adds some days, months, years, hours, minutes, and seconds to a date. The concept of week numbers is virtually unknown in large parts of the world, so adding support for them is not high on the agenda for most software companies. Add this to your source code. The WEEKNUM function takes a date and returns a week number (1-54) that corresponds to the week of year. In this article we will explain how to calculate the number of days between two dates in PHP. DateTime class can be really helpful. An explanation of the code snippet above: We set our YYYY-MM-DD date string to “2002-12-02”. From PHP 5.2, PHP provides some ready-made classes to help developers to solve daily problems they face. The Unix timestamp contains the number of seconds between the Unix Epoch (January 1 1970 00:00:00 GMT) and the time specified. A lot of software that deal with dates has poor support for week number, in particular the ISO week numbering scheme that is used on this site. There are many different way to find the number of days between two dates in PHP.. Week numbers in JavaScript How to get the week number from a date. If omitted, the current date and time will be used (as in the examples above). WEEKNUM takes two arguments: a date, and (optionally) return_type, which controls the scheme used to calculate the week number.. By default, the WEEKNUM function uses a scheme where week 1 begins on … echo "Day ", date ('w', strtotime ('2016-10-02 Monday next week'))," of next week is ", date ('d M Y', strtotime ('2016-10-02 Monday next week'));?> Prior to PHP 5.6.23, this results in: Today is Sun 2 Oct 2016, day 0 of this week. To get the ISO week number (1-53) of a Date object, use date.getWeek(). Method 3: Using DateTime class to get current month. Just use the powerful date() function that takes a format string and an optional unix timestamp as arguments. Program 1: Get the default first day of a week when the time-string is “this week”. Getting the week number for a date in PHP is simple. Example. Get the current week number and print it. Sample week and year : 12, 2014 To get current month using DateTime class, follow the two steps-Create an object of DateTime() class. 13 thoughts on “ Getting Dates From Week Numbers in PHP ” Slawek Lukasiewicz on March 23, 2011 at 14:45 said: Interesting discovery! i.e. Recently I have used diff() method to calculate distance between two dates with DateInterval. Week number in PHP. To get the corresponding four-digit year, use date.getWeekYear(). Note: In PHP, the week starts with Monday, so if the time-string is given as “this week” the output will be timestamp of Monday which can make readable by passing it through date() function. The 2nd of December, 2002. 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