IntlCalendar::fieldDifference()

(PHP 5 >= 5.5.0, PHP 7, PECL >= 3.0.0a1)

Calculate difference between given time and this objectʼs time

说明

面向对象风格
publicIntlCalendar::fieldDifference(float $when,int $field): int

过程化风格
intlcal_field_difference(IntlCalendar$cal,float $when,int $field): int

Return the difference between the given time and the time this object is set to, with respect to the quantity specified the$fieldparameter.

This method is meant to be called successively, first with the most significant field of interest down to the least significant field. To this end, as a side effect, this calendarʼs value for the field specified is advanced by the amount returned.

参数

$cal

The IntlCalendar resource.

$when

The time against which to compare the quantity represented by the$field. For the result to be positive, the time given for this parameter must be ahead of the time of the object the method is being invoked on.

$field

The field that represents the quantity being compared.

One of the IntlCalendar date/time field constants. These are integer values between0and IntlCalendar::FIELD_COUNT.

返回值

Returns a(signed)difference of time in the unit associated with the specified field 或者在失败时返回FALSE.

范例

IntlCalendar::fieldDifference()

<?php
ini_set('date.timezone', 'Europe/Lisbon');
ini_set('intl.default_locale', 'fr_FR');
$cal1 = IntlCalendar::fromDateTime('2012-02-29 09:00:11');
$cal2 = IntlCalendar::fromDateTime('2013-03-01 09:19:29');
$time = $cal2->getTime();
echo "Time before: ", IntlDateFormatter::formatObject($cal1), "\n";
printf(
    "The difference in time is %d year(s), %d month(s), "
  . "%d day(s), %d hour(s) and %d minute(s)\n",
    $cal1->fieldDifference($time, IntlCalendar::FIELD_YEAR),
    $cal1->fieldDifference($time, IntlCalendar::FIELD_MONTH),
    $cal1->fieldDifference($time, IntlCalendar::FIELD_DAY_OF_MONTH),
    $cal1->fieldDifference($time, IntlCalendar::FIELD_HOUR_OF_DAY),
    $cal1->fieldDifference($time, IntlCalendar::FIELD_MINUTE)
);
//now it was advanced to the target time, exception for the seconds,
//for which we did not measure the difference
echo "Time after: ", IntlDateFormatter::formatObject($cal1), "\n";

以上例程会输出：

Time before: 29 févr. 2012 09:00:11
The difference in time is 1 year(s), 0 month(s), 1 day(s), 0 hour(s) and 19 minute(s)
Time after: 1 mars 2013 09:19:11