The IntlCalendar::isSet() function is an inbuilt function in PHP which is used to check whether a given field is set or not. This function is opposite to IntlCalendar::clear() function.
Syntax:
- Object oriented style
bool IntlCalendar::isSet( int $field )
- Procedural style
bool intlcal_is_set( IntlCalendar $cal, int $field )
Parameters: This function uses two parameters as mentioned above and described below:
- $cal: This parameter holds the resource of IntlCalendar object.
- $field: This parameter holds one of the IntlCalendar date/time field constants. The value of field constants are integer and lies between 0 to IntlCalendar::FIELD_COUNT.
Return Value: This function returns TRUE if the field is set and returns error if the field is not set.
Below program illustrates the IntlCalendar::isSet() function in PHP:
Program:
<?php   // Set the DateTime zone ini_set('date.timezone', 'Asia/Calcutta');   // Create an instance of IntlCalendar $calendar = IntlCalendar::createInstance('Asia/Calcutta');   // Check month field is set or not var_dump($calendar->isSet(IntlCalendar::FIELD_MONTH));   // Set the DateTime to the object $calendar->set(2019, 8, 29);   // Check for month field var_dump($calendar->isSet(IntlCalendar::FIELD_MONTH));   // Set the DateTime object $calendar->set(strtotime('2019-09-22 12:30:00'));   // Check for year field var_dump($calendar->isSet(IntlCalendar::FIELD_YEAR));   ?> |
Output:
bool(true) bool(true) bool(true)
Reference: https://www.php.net/manual/en/intlcalendar.isset.php
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