IntlCalendar::fieldDifference

(PHP 5.5.0, PECL >= 3.0.0a1)

IntlCalendar::fieldDifference — Calculate difference between given time and this object?s time

说明

面向对象风格

public int IntlCalendar::fieldDifference ( float $when , int $field )

过程化风格

int intlcal_field_difference ( IntlCalendar $cal , float $when , int $field )

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

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 calendar?s 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 between 0 and 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

Example #1 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