IntlCalendar::roll
(PHP 5.5.0, PHP 7, PECL >= 3.0.0a1)
IntlCalendar::roll — Add value to field without carrying into more significant fields
Description
Object oriented style
public bool IntlCalendar::roll ( int $field , mixed $amountOrUpOrDown )Procedural style
bool intlcal_roll ( IntlCalendar $cal , int $field , mixed $amountOrUpOrDown )Adds a (signed) amount to a field. The difference with respect to IntlCalendar::add() is that when the field value overflows, it does not carry into more significant fields.
Parameters
cal
The IntlCalendar resource.
field
One of the IntlCalendar date/time field constants. These are integer values between 0 and IntlCalendar::FIELD_COUNT.
amountOrUpOrDown
The (signed) amount to add to the field, TRUE for rolling up (adding 1), or FALSE for rolling down (subtracting 1).
Return Values
Returns TRUE on success or FALSE on failure.
Examples
Example #1 IntlCalendar::roll()
<?php
ini_set('date.timezone', 'Europe/Lisbon');
ini_set('intl.default_locale', 'pt_PT');
$cal = new IntlGregorianCalendar(2013, 5 /* June */, 30);
$cal->add(IntlCalendar::FIELD_DAY_OF_MONTH, 1);
var_dump(IntlDateFormatter::formatObject($cal)); // "01/07/2013, 00:00:00"
$cal->set(2013, 5 /* June */, 30);
$cal->roll(IntlCalendar::FIELD_DAY_OF_MONTH, true); // roll up, same as rolling +1
var_dump(IntlDateFormatter::formatObject($cal)); // "01/06/2013, 00:00:00"The above example will output:
string(20) "01/07/2013, 00:00:00"
string(20) "01/06/2013, 00:00:00"See Also
- IntlCalendar::add() - Add a (signed) amount of time to a field
- IntlCalendar::set() - Set a time field or several common fields at once
← IntlCalendar::isWeekend
IntlCalendar::set →
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