(PHP 5 >= 5.5.0, PHP 7, PHP 8, PECL intl >= 3.0.0)
IntlDateFormatter::getCalendarObject -- datefmt_get_calendar_object — Get copy of formatterʼs calendar object
Object-oriented style
Procedural style
Obtain a copy of the calendar object used internally by this formatter. This calendar will have a type (as in gregorian, japanese, buddhist, roc, persian, islamic, etc.) and a timezone that match the type and timezone used by the formatter. The date/time of the object is unspecified.
This function has no parameters.
   A copy of the internal calendar object used by this formatter,
   or null if none has been set,  or false on failure.
  
Example #1 IntlDateFormatter::getCalendarObject() example
<?php
$formatter = IntlDateFormatter::create(
    "fr_FR@calendar=islamic", 
    NULL,
    NULL,
    "GMT-01:00",
    IntlDateFormatter::TRADITIONAL
);
$cal = $formatter->getCalendarObject();
var_dump(
    $cal->getType(),
    $cal->getTimeZone(),
    $cal->getLocale(Locale::VALID_LOCALE)
);
The above example will output:
string(7) "islamic"
object(IntlTimeZone)#3 (4) {
  ["valid"]=>
  bool(true)
  ["id"]=>
  string(9) "GMT-01:00"
  ["rawOffset"]=>
  int(-3600000)
  ["currentOffset"]=>
  int(-3600000)
}
string(5) "fr_FR"
