IntlCalendar::createInstance
IntlCalendar::fieldDifference
IntlCalendar
PHP Manual

# IntlCalendar::equals

(PHP 5.5.0, PECL >= 3.0.0a1)

IntlCalendar::equals — Compare time of two IntlCalendar objects for equality

### 説明

public bool IntlCalendar::equals ( IntlCalendar `$calendar` )

Returns true if this calendar and the given calendar have the same time. The settings, calendar types and field states do not have to be the same.

### パラメータ

`calendar`

  The calendar to compare with this object.

### 返り値

Returns `TRUE` if the current time of both this and the passed in IntlCalendar object are the same, or `FALSE` otherwise. The value `FALSE` can also be returned on failure. This can only happen if bad arguments are passed in. In any case, the two cases can be distinguished by calling intl_get_error_code().

### 例

例1 IntlCalendar::equals()

`<?php
ini_set('date.timezone', 'UTC');
$cal1 = IntlCalendar::createInstance(NULL, 'es_ES');
$cal2 = clone $cal1;
var_dump($cal1->equals($cal2)); //TRUE
//The locale is not included in the comparison
$cal2 = IntlCalendar::createInstance(NULL, 'pt_PT');
$cal2->setTime($cal1->getTime());
var_dump($cal1->equals($cal2)); //TRUE
//And set fields state is not included as well
$cal2->clear(IntlCalendar::FIELD_YEAR);
var_dump($cal1->isSet(IntlCalendar::FIELD_YEAR) ==
$cal2->isSet(IntlCalendar::FIELD_YEAR)); //FALSE
var_dump($cal1->equals($cal2)); //TRUE
//Neither is the calendar type
$cal2 = IntlCalendar::createInstance(NULL, 'es_ES@calendar=islamic');
$cal2->setTime($cal1->getTime());
var_dump($cal1->equals($cal2)); //TRUE
//Only the time is
$cal2 = clone $cal1;
$cal2->setTime($cal1->getTime() + 1.);
var_dump($cal1->equals($cal2)); //FALSE`

IntlCalendar::createInstance
IntlCalendar::fieldDifference
IntlCalendar
PHP Manual