README

Extends the native datetime objects (\DateTime and \DateTimeImmutable) with a lot of additional helpful methods.

Most of the new methods are short cuts of already existing functionality. But these methods will help you to save time and code if you need to handle a many date- and time-operations.

All new methods support method chaining.

Table of Contents

• Requirements
• Integration
• Usage
  • Static Initialization
  • Cloning
  • Manipulating
  • Instant Setter Methods

Requirements

The usage of PHP v7.3 is obligatory.

Integration

Please install via composer.

composer require prokki/ext-datetime "^0.0"

Usage

The classes and instances of the classes ExtDateTime/DateTime and ExtDateTime/DateTimeImmutable can be used exactly like native datetime objects/classes.

Example

use ExtDateTime\DateTime;
use ExtDateTime\DateTimeImmutable;

// create a datetime object
$dateTime = new DateTime("now");

// create an immutable datetime object
$dateTimeImmutable = new DateTimeImmutable("now");

Static Initialization

Similar to the native objects there are several others ways to create a datetime object.

All static methods can be used to implement method chaining.

create()

Use the static constructor create() to use chaining immediately.

use ExtDateTime\DateTime;

// create a datetime object
// and use chaining immediately
$dateTime = DateTime::create("now")
            ->addHours(5)
            ->addDays(5)
            ;

current()

The static constructor current() returns a datetime object with the current date/time. But in opposite to DateTime::create("now") this method returns the object with additional microtime.

use ExtDateTime\DateTime;

$currentMicroseconds = DateTime::current()->format("u");         // output example 654321
$noMicroseconds      = DateTime::create("now")->format("u");     // output always 000000

createFromObject()

Creates a new object from any datetime object implementing the DateTimeInterface.

use ExtDateTime\DateTimeImmutable;

// create an immutable datetime object from a native non-immutable object
$datetime = DateTimeImmutable::createFromObject(new \DateTime());

Cloning

Two new methods add the availability to use chaining directly after cloning an object.

duplicate()

This method is just a wrapper function for clone:

use ExtDateTime\DateTime;

// create a datetime object
$datetime = DateTime::current();

// clone the datetime object and proceed like usual with chaining
$clone = $datetime->duplicate()
         ->addHours(5)
         ->addDays(5)
         ;

toImmutable() / toMutable()

Instead of using static constructors (DateTime::createFromImmutable or DateTimeImmutable::createFromMutable) you can also use these new non-static methods.

use ExtDateTime\DateTime;

// create a datetime object
$datetime = DateTime::current();

$clonedImmutable = $datetime->toImmutable();       // only available in class DateTime

$clonedMutable   = $clonedImmutable->toMutable();  // only available in class DateTimeImmutable

Manipulating

Most of the new methods are short cuts to avoid re-initialization of necessary parameter in your code.

addHours() / subHours()

Adds or subtracts hours of a datetime object.

use ExtDateTime\DateTime;

// create a datetime object and add 10 hours
$datetimeFuture = DateTime::create("2020-07-30 12:35:17")
                  ->addHours(10)
                  ->format("Y-m-d h:i:s");                   // "2020-07-30 22:35:17"

// create a datetime object and subtracts 10 hours
$datetimeFuture = DateTime::create("2020-07-30 12:35:17")
                  ->subHours(10)
                  ->format("Y-m-d h:i:s");                   // "2020-07-30 02:35:17"

addDays() / subHours()

Adds or subtracts days of a datetime object.

use ExtDateTime\DateTime;

// create a datetime object and add 10 days
$datetimeFuture = DateTime::create("2020-07-30 12:35:17")
                  ->addDays(10)
                  ->format("Y-m-d h:i:s");                   // "2020-08-09 22:35:17"

// create a datetime object and subtracts 10 days
$datetimeFuture = DateTime::create("2020-07-30 12:35:17")
                  ->subDays(10)
                  ->format("Y-m-d h:i:s");                   // "2020-07-20 02:35:17"

addMonth() / subMonth()

Adds or subtracts months of a datetime object.

Attention: This methods behaves differently than the suspected background function of adding days. If the current date is the last day of the month (31/30/29/28) and the target month has less days then the current month, the day will be set to the last day of the target month.

Example: The datetime object is

2017-01-30 17:00:00

and you want to add 1 month, the result will be

2017-02-28 17:00:00

use ExtDateTime\DateTime;

// create a datetime object and add 10 months
$datetimeFuture = DateTime::create("2020-07-30 12:35:17")
                  ->addMonth(10)
                  ->format("Y-m-d h:i:s");                   // "2020-08-09 22:35:17"

// create a datetime object and subtracts 10 months
$datetimeFuture = DateTime::create("2020-07-30 12:35:17")
                  ->subMonth(10)
                  ->format("Y-m-d h:i:s");                   // "2020-07-20 02:35:17"

Instant Setter Methods

toEndOfDay()

Sets the time to the end of the day (23:59:59).

use ExtDateTime\DateTime;

// create a datetime object and sets the time to the end of the day
$datetimeFuture = DateTime::create("2020-07-30 12:35:17")
                  ->toEndOfDay(10)
                  ->format("Y-m-d h:i:s");                   // "2020-07-30 23:59:59"

toNoon()

Sets the time to noon (12:00:00).

use ExtDateTime\DateTime;

// create a datetime object and sets the time to noon
$datetimeFuture = DateTime::create("2020-07-30 12:35:17")
                  ->toNoon(10)
                  ->format("Y-m-d h:i:s");                   // "2020-07-30 12:00:00"

toStartOfDay()

Sets the time to the start of the day (00:00:00).

use ExtDateTime\DateTime;

// create a datetime object and sets the time the start of the day
$datetimeFuture = DateTime::create("2020-07-30 12:35:17")
                  ->toStartOfDay(10)
                  ->format("Y-m-d h:i:s");                   // "2020-07-30 00:00:00"

toStartOfMonth()

Sets the date to the first day of the month and additionally the time to the start of the day (00:00:00).

use ExtDateTime\DateTime;

// create a datetime object and sets the date to the first day of the month
$datetimeFuture = DateTime::create("2020-07-30 12:35:17")
                  ->toStartOfMonth()
                  ->format("Y-m-d h:i:s");                   // "2020-07-01 00:00:00"

toEndOfMonth()

Sets the date to the last day of the month and additionally the time to the end of the day (23:59:59).

use ExtDateTime\DateTime;

// create a datetime object and sets the date to the last day of the month
$datetimeFuture = DateTime::create("2020-07-30 12:35:17")
                  ->toEndOfMonth()
                  ->format("Y-m-d h:i:s");                   // "2020-07-31 23:59:59"