Php datetime get day of week

date

Returns a string formatted according to the given format string using the given integer timestamp (Unix timestamp) or the current time if no timestamp is given. In other words, timestamp is optional and defaults to the value of time() .

Unix timestamps do not handle timezones. Use the DateTimeImmutable class, and its DateTimeInterface::format() formatting method to format date/time information with a timezone attached.

Parameters

Note: date() will always generate 000000 as microseconds since it takes an int parameter, whereas DateTime::format() does support microseconds if DateTime was created with microseconds.

The optional timestamp parameter is an int Unix timestamp that defaults to the current local time if timestamp is omitted or null . In other words, it defaults to the value of time() .

Return Values

Returns a formatted date string.

Errors/Exceptions

Every call to a date/time function will generate a E_WARNING if the time zone is not valid. See also date_default_timezone_set()

Changelog

Version	Description
8.0.0	timestamp is nullable now.

Examples

Example #1 date() examples

// set the default timezone to use.
date_default_timezone_set ( ‘UTC’ );

// Prints something like: Monday
echo date ( «l» );

// Prints something like: Monday 8th of August 2005 03:12:46 PM
echo date ( ‘l jS \of F Y h:i:s A’ );

// Prints: July 1, 2000 is on a Saturday
echo «July 1, 2000 is on a » . date ( «l» , mktime ( 0 , 0 , 0 , 7 , 1 , 2000 ));

/* use the constants in the format parameter */
// prints something like: Wed, 25 Sep 2013 15:28:57 -0700
echo date ( DATE_RFC2822 );

// prints something like: 2000-07-01T00:00:00+00:00
echo date ( DATE_ATOM , mktime ( 0 , 0 , 0 , 7 , 1 , 2000 ));
?>

You can prevent a recognized character in the format string from being expanded by escaping it with a preceding backslash. If the character with a backslash is already a special sequence, you may need to also escape the backslash.

Example #2 Escaping characters in date()

It is possible to use date() and mktime() together to find dates in the future or the past.

Example #3 date() and mktime() example

$tomorrow = mktime ( 0 , 0 , 0 , date ( «m» ) , date ( «d» )+ 1 , date ( «Y» ));
$lastmonth = mktime ( 0 , 0 , 0 , date ( «m» )- 1 , date ( «d» ), date ( «Y» ));
$nextyear = mktime ( 0 , 0 , 0 , date ( «m» ), date ( «d» ), date ( «Y» )+ 1 );
?>

Note:

This can be more reliable than simply adding or subtracting the number of seconds in a day or month to a timestamp because of daylight saving time.

Some examples of date() formatting. Note that you should escape any other characters, as any which currently have a special meaning will produce undesirable results, and other characters may be assigned meaning in future PHP versions. When escaping, be sure to use single quotes to prevent characters like \n from becoming newlines.

Example #4 date() Formatting

// Assuming today is March 10th, 2001, 5:16:18 pm, and that we are in the
// Mountain Standard Time (MST) Time Zone

$today = date ( «F j, Y, g:i a» ); // March 10, 2001, 5:16 pm
$today = date ( «m.d.y» ); // 03.10.01
$today = date ( «j, n, Y» ); // 10, 3, 2001
$today = date ( «Ymd» ); // 20010310
$today = date ( ‘h-i-s, j-m-y, it is w Day’ ); // 05-16-18, 10-03-01, 1631 1618 6 Satpm01
$today = date ( ‘\i\t \i\s \t\h\e jS \d\a\y.’ ); // it is the 10th day.
$today = date ( «D M j G:i:s T Y» ); // Sat Mar 10 17:16:18 MST 2001
$today = date ( ‘H:m:s \m \i\s\ \m\o\n\t\h’ ); // 17:03:18 m is month
$today = date ( «H:i:s» ); // 17:16:18
$today = date ( «Y-m-d H:i:s» ); // 2001-03-10 17:16:18 (the MySQL DATETIME format)
?>

To format dates in other languages, IntlDateFormatter::format() can be used instead of date() .

Notes

Note:

To generate a timestamp from a string representation of the date, you may be able to use strtotime() . Additionally, some databases have functions to convert their date formats into timestamps (such as MySQL’s » UNIX_TIMESTAMP function).

Timestamp of the start of the request is available in $_SERVER[‘REQUEST_TIME’] .

See Also

• DateTimeImmutable::__construct() — Returns new DateTimeImmutable object
• DateTimeInterface::format() — Returns date formatted according to given format
• gmdate() — Format a GMT/UTC date/time
• idate() — Format a local time/date part as integer
• getdate() — Get date/time information
• getlastmod() — Gets time of last page modification
• mktime() — Get Unix timestamp for a date
• IntlDateFormatter::format() — Format the date/time value as a string
• time() — Return current Unix timestamp
• Predefined DateTime Constants

User Contributed Notes

• Date/Time Functions
  • checkdate
  • date_​add
  • date_​create_​from_​format
  • date_​create_​immutable_​from_​format
  • date_​create_​immutable
  • date_​create
  • date_​date_​set
  • date_​default_​timezone_​get
  • date_​default_​timezone_​set
  • date_​diff
  • date_​format
  • date_​get_​last_​errors
  • date_​interval_​create_​from_​date_​string
  • date_​interval_​format
  • date_​isodate_​set
  • date_​modify
  • date_​offset_​get
  • date_​parse_​from_​format
  • date_​parse
  • date_​sub
  • date_​sun_​info
  • date_​sunrise
  • date_​sunset
  • date_​time_​set
  • date_​timestamp_​get
  • date_​timestamp_​set
  • date_​timezone_​get
  • date_​timezone_​set
  • date
  • getdate
  • gettimeofday
  • gmdate
  • gmmktime
  • gmstrftime
  • idate
  • localtime
  • microtime
  • mktime
  • strftime
  • strptime
  • strtotime
  • time
  • timezone_​abbreviations_​list
  • timezone_​identifiers_​list
  • timezone_​location_​get
  • timezone_​name_​from_​abbr
  • timezone_​name_​get
  • timezone_​offset_​get
  • timezone_​open
  • timezone_​transitions_​get
  • timezone_​version_​get

  Источник

  Find the Date of a Day of the Week in PHP

  

  1. Get the Date for a Numerical Day of the Week in PHP
  2. Get the Day of the Week From a Date String in PHP

  This article teaches you how to get the date of a numerical day of the week using PHP. We base our solution on assigning numbers 0 to 6 to weekdays from Sunday to Saturday.

  We’ll use PHP date and strtotime functions for our calculations.

  Get the Date for a Numerical Day of the Week in PHP

  To get the date for a number, we’ll select an initial date from a week. The date will have the format yyyy-mm-dd , and then we select a number between 0 and 6.

  By doing this, we’ll know that any date PHP returns for the number are in the same week as the initial date. Afterward, we use PHP to get the date using our selected number and the initial date.

  The PHP code will use the following algorithm:

  Define the initial date.

  Choose a number between 0 and 6.

  Ensure the number falls between 0 and 6.

  Convert our number to a day of the week using PHP date and strtotime .

  Convert the day of the week to our date in the format of yyyy-mm-dd . We will use the date() function and its argument are:

  • Y-m-d
  • Unix timestamp of the day of the week from Step 4 subtracted from our chosen number.
  • Unix timestamp of our initial date.

  The following is the implementation of this algorithm:

  php  $initial_date = '2022-06-22';  $day = 0;   if ($day >= 0 and $day  6)   $day_of_the_week = date('w', strtotime($initial_date));   $the_date = date('Y-m-d', strtotime(($day - $day_of_the_week). ' day', strtotime($initial_date)));   echo($the_date);  > else   echo 'You have entered an invalid day value. Check the "$day" variable and try again';  > ?> 

  Get the Day of the Week From a Date String in PHP

  When you have the date in the format yyyy-mm-dd , you can find the day it falls on, e.g., Monday or Sunday. Since we already have a date (from the last section), we can modify our code to print the day name.

  The following is the modified code along with the changes from the previous list:

  php  $the_date = "2022-06-19"; // The date from the previous section  $name_of_the_day = date('l', strtotime($the_date));  echo "The date " . $the_date . " falls on a " . $name_of_the_day; ?> 

  The date 2022-06-19 falls on a Sunday 

  Habdul Hazeez is a technical writer with amazing research skills. He can connect the dots, and make sense of data that are scattered across different media.

  Related Article — PHP Date

  Источник

  PHP Get First and Last Day of Week by Week Number

  I’m adding a simple post here with a PHP method that has helped me. This method calculates the beginning and ending of a week given the year and week number. The problem I’ve run into is that “first day of the week” is subjective. Some people believe the first day of the week is “Monday” while others believe the first day of the week is “Sunday”. ISO-8601 specifies the first day of the week as “Monday”. Whereas, most western calendars display Sunday as the first day of the week and Saturday as the last day of the week. To add to the confusion, PHP’s methods themselves seem confused about what the first and last day of the week are. For example:

  $new_date = new DateTime; // returns Monday, Jan 29 2018 $new_date->setISODate(2018, 5); // returns Sunday, Feb 4 2018 $new_date->modify('sunday this week'); // returns Sunday, Jan 28 2018 $new_date->setISODate(2018, 5 ,0); 

  You’ll notice that the string «sunday this week» actually returns Sunday, Feb 4 whereas setting the date to the 0 day of the same week returns Sunday, Jan 28. I’m not saying that Sunday doesn’t happen twice a week… but Sunday doesn’t happen twice a week. All this to say, the method below is the one I’ve found returns the most helpful results:

  function get_first_and_last_day_of_week( $year_number, $week_number )  // we need to specify 'today' otherwise datetime constructor uses 'now' which includes current time $today = new DateTime( 'today' ); return (object) [ 'first_day' => clone $today->setISODate( $year_number, $week_number, 0 ), 'last_day' => clone $today->setISODate( $year_number, $week_number, 6 ) ]; > 

  Источник

  Php datetime get day of week

  Для того, чтобы получить день недели на английском. вам понадобится:

  Из Этой таблицы вам потребуется аргумент(Полное наименование дня недели от Sunday до Saturday):

  Код вывода дня недели на английском:

  Результат вывод дня недели по-английски:

  Код вывода дня недели на английском у вас есть. Теперь давайте выведем его прямо здесь:

  Php номер дня недели

  Для того, чтобы вывести текущее наименование номера дня недели вам опять понадобится функция date и также таблица аргументов.

  Вам потребуется аргумент, который отвечает за порядковый номер недели, это английская буква N:

  Код вывода номера дня недели.

  Результат вывода номера дня недели.

  После того, как мы определились с кодом, который будет получать и выводить порядковый номер недели. роазместим его прямо здесь:

  Php день недели на русском

  Конечно английское название дни недели в php это хорошо, но как нам показать название недели по-русски!? Встроенного решения в php нет, поэтому, для этого вам понадобится:

  Создадим массив, где в каждой ячейке следующего массива располагаем названия дня недели на русском.

  $days = array( 1 => «Понедельник» , «Вторник» , «Среда» , «Четверг» , «Пятница» , «Суббота» , «Воскресенье» );

  Дала вам понадобятся знания обращения с одномерным массивом и получение соответствующей ячейки массива.

  Как вы знаете/не знаете, чтобы получить ячейку массива — например «понедельник». , нужно соорудить вот такую конструкцию:

  Но если мы вместо цифры внутри квадратных скобок поместим функцию с аргументом., то получим нужный нам результат:

  Код получения дня недели на русском php.

  Результат получения и вывода дня недели на русском

  Что дальше? Располагаем выше приведенный код получения дня недели на русском через php прямо здесь:

  Php день недели произвольной даты на русском

  Для того, чтобы получить день недели произвольной даты, как вариант, что пришло первое в голову.

  Нам нужна временная метка даты, я рассказывал о том, как превращать дату(пусть это будет 2019-02-05 11:38) в метку времени(получили — 1549355880) здесь

  Далее нам нужна опять та же функция date , устанавливаем функции аргумент w :

  w -> Порядковый номер дня недели -> От 0 (воскресенье) до 6 (суббота) (см. все аргументы)

  Источник