The DateTime class

(PHP 5 >= 5.2.0, PHP 7, PHP 8)

Introduction

Representation of date and time.

This class behaves the same as DateTimeImmutable, except objects are modified itself when modification methods such as DateTime::modify() are called.

Warning

Calling methods on objects of the class DateTime will change the information encapsulated in these objects, if you want to prevent that you will have to use clone operator to create a new object. Use DateTimeImmutable instead of DateTime to obtain this recommended behaviour by default.

Class synopsis

classDateTimeimplementsDateTimeInterface {

publicconststringDateTimeInterface::ATOM = "Y-m-d\\TH:i:sP";

publicconststringDateTimeInterface::COOKIE = "l, d-M-Y H:i:s T";

publicconststringDateTimeInterface::ISO8601 = "Y-m-d\\TH:i:sO";

publicconststringDateTimeInterface::ISO8601_EXPANDED = "X-m-d\\TH:i:sP";

publicconststringDateTimeInterface::RFC822 = "D, d M y H:i:s O";

publicconststringDateTimeInterface::RFC850 = "l, d-M-y H:i:s T";

publicconststringDateTimeInterface::RFC1036 = "D, d M y H:i:s O";

publicconststringDateTimeInterface::RFC1123 = "D, d M Y H:i:s O";

publicconststringDateTimeInterface::RFC7231 = "D, d M Y H:i:s \\G\\M\\T";

publicconststringDateTimeInterface::RFC2822 = "D, d M Y H:i:s O";

publicconststringDateTimeInterface::RFC3339 = "Y-m-d\\TH:i:sP";

publicconststringDateTimeInterface::RFC3339_EXTENDED = "Y-m-d\\TH:i:s.vP";

publicconststringDateTimeInterface::RSS = "D, d M Y H:i:s O";

publicconststringDateTimeInterface::W3C = "Y-m-d\\TH:i:sP";

public__construct(string$datetime = "now", ?DateTimeZone$timezone = null)

publicadd(DateInterval$interval): DateTime

publicstaticcreateFromFormat(string$format, string$datetime, ?DateTimeZone$timezone = null): DateTime|false

publicstaticcreateFromImmutable(DateTimeImmutable$object): static

publicstaticcreateFromInterface(DateTimeInterface$object): DateTime

publicmodify(string$modifier): DateTime|false

publicstatic__set_state(array$array): DateTime

publicsetDate(int$year, int$month, int$day): DateTime

publicsetISODate(int$year, int$week, int$dayOfWeek = 1): DateTime

publicsetTime(
    int$hour,
    int$minute,
    int$second = 0,
    int$microsecond = 0
): DateTime

publicsetTimestamp(int$timestamp): DateTime

publicsetTimezone(DateTimeZone$timezone): DateTime

publicsub(DateInterval$interval): DateTime

publicdiff(DateTimeInterface$targetObject, bool$absolute = false): DateInterval

publicformat(string$format): string

publicgetOffset(): int

publicgetTimestamp(): int

publicgetTimezone(): DateTimeZone|false

public__wakeup(): void

}

Changelog

Version	Description
7.2.0	The class constants of DateTime are now defined on DateTimeInterface.
7.1.0	The DateTime constructor now includes the current microseconds in the constructed value. Before this, it would always initialise the microseconds to `0`.

DateTime::add — Modifies a DateTime object, with added amount of days, months, years, hours, minutes and seconds
DateTime::__construct — Returns new DateTime object
DateTime::createFromFormat — Parses a time string according to a specified format
DateTime::createFromImmutable — Returns new DateTime instance encapsulating the given DateTimeImmutable object
DateTime::createFromInterface — Returns new DateTime object encapsulating the given DateTimeInterface object
DateTime::getLastErrors — Alias of DateTimeImmutable::getLastErrors
DateTime::modify — Alters the timestamp
DateTime::__set_state — The __set_state handler
DateTime::setDate — Sets the date
DateTime::setISODate — Sets the ISO date
DateTime::setTime — Sets the time
DateTime::setTimestamp — Sets the date and time based on an Unix timestamp
DateTime::setTimezone — Sets the time zone for the DateTime object
DateTime::sub — Subtracts an amount of days, months, years, hours, minutes and seconds from a DateTime object

The DateTime class

Introduction

Class synopsis

Changelog

Table of Contents