PHP | IntlCalendar fieldDifference() Function

The IntlCalendar::fieldDifference() function is an inbuilt function in PHP which is used to return the difference between given time and the object time.

Syntax:

  • Object oriented style:
    int IntlCalendar::fieldDifference( float $when, int $field )
  • Procedural style:
    int intlcal_field_difference( IntlCalendar $cal, float $when, int $field )

Parameters:



  • $cal: This parameter holds the IntlCalendar resource name.
  • $when: This parameter holds the time against which to compare the quantity represented by the field.
  • $field: This parameter holds the field that represents the quantity being compared.

Return Value: This function returns a signed difference of time in the unit associated with the specified field on success or FALSE on failure.

Below program illustrates the IntlCalendar::fieldDifference() function in PHP:

Program:

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<?php
  
// Set the timezone
ini_set('date.timezone', 'Asia/Calcutta');
  
// Get the time from calendar
$calendar1 = IntlCalendar::fromDateTime('2018-12-21 09:30:25');
$calendar2 = IntlCalendar::fromDateTime('2019-08-29 11:20:20');
  
// Get time represented by the object
$calTime = $calendar2->getTime();
  
// Display the first time
echo "First Time: " . IntlDateFormatter::formatObject($calendar1) . "\n";
  
// Display the last time
echo "Last Time: " . IntlDateFormatter::formatObject($calendar2) . "\n";
  
// Time difference
echo "Time difference: "
    . $calendar1->fieldDifference($calTime
            IntlCalendar::FIELD_YEAR) . "-Years "
      
    . $calendar1->fieldDifference($calTime,
            IntlCalendar::FIELD_MONTH) . "-Months "
      
    . $calendar1->fieldDifference($calTime
            IntlCalendar::FIELD_DAY_OF_MONTH) . "-Days "
      
    . $calendar1->fieldDifference($calTime
            IntlCalendar::FIELD_HOUR_OF_DAY) . "-Hours "
      
    . $calendar1->fieldDifference($calTime
            IntlCalendar::FIELD_MINUTE) . "-Minutes";
  
?>

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Output:

First Time: Dec 21, 2018, 9:30:25 AM
Last Time: Aug 29, 2019, 11:20:20 AM
Time difference: 0-Years 8-Months 8-Days 1-Hours 49-Minutes

Reference: https://www.php.net/manual/en/intlcalendar.fielddifference.php




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