The DateTimeImmutable class
(PHP 5 >= 5.5.0)
Introduction
This class behaves the same as DateTime except it never modifies itself but returns a new object instead.
Class synopsis
DateTimeImmutable
implements
DateTimeInterface
{
/* Methods */
public static DateTimeImmutable createFromFormat
( string
}$format
, string $time
[, DateTimeZone $timezone
] )Table of Contents
- DateTimeImmutable::add — Adds an amount of days, months, years, hours, minutes and seconds
- DateTimeImmutable::__construct — Returns new DateTimeImmutable object
- DateTimeImmutable::createFromFormat — Returns new DateTimeImmutable object formatted according to the specified format
- DateTimeImmutable::getLastErrors — Returns the warnings and errors
- DateTimeImmutable::modify — Alters the timestamp
- DateTimeImmutable::__set_state — The __set_state handler
- DateTimeImmutable::setDate — Sets the date
- DateTimeImmutable::setISODate — Sets the ISO date
- DateTimeImmutable::setTime — Sets the time
- DateTimeImmutable::setTimestamp — Sets the date and time based on an Unix timestamp
- DateTimeImmutable::setTimezone — Sets the time zone
- DateTimeImmutable::sub — Subtracts an amount of days, months, years, hours, minutes and seconds
Коментарии
Here's a simple example on how this class works :
// Create a DateTimeImmutable Object
$date = new DateTimeImmutable('2000-01-01');
// "Change" that object and assign it's value to a new variable
$date2 = $date->add(new DateInterval('P6M5DT24H'));
// Check out the content of the two variables
echo $date->format('Y-m-d') . "\n";
// 2000-01-01
echo $date2->format('Y-m-d') . "\n";
// 2000-07-07
class MyDateTime extends DateTimeImmutable
{
public function addDay(int $amount): MyDateTime
{
return $this->add(new DateInterval("P" . $amount . "D"));
}
}
addDay will return DateTimeImmutable not MyDateTime. It looks like there is no "return static;"
i wish i would be
Note: If you are trying to get 02.29 for non leap year it will return 03.01Example:
<?php
new DateTimeImmutable('2017-02-29') // 2017-03-01
?>