(PHP 5 >= 5.5.0, PHP 7, PHP 8, PECL >= 3.0.0a1)
IntlCalendar::isWeekend — Whether a certain date/time is in the weekend
Style orienté objet
$timestamp = null): boolStyle procédural
Returns whether either the obejctʼs current time or the provided timestamp occur during a weekend in this objectʼs calendar system.
This function requires ICU 4.4 or later.
calendarUne instance IntlCalendar.
timestamp
      An optional timestamp representing the number of milliseconds since the
      epoch, excluding leap seconds. If null, this objectʼs current time is
      used instead.
     
A bool indicating whether the given or this objectʼs time occurs in a weekend.
 En cas d&échec false est aussi retourné. Pour détecter les conditions d&erreur
 intl_get_error_code() doit être utilisé, ou paramétrer Intl pour lancer des
 exceptions.
Exemple #1 IntlCalendar::isWeekend()
<?php
ini_set('date.timezone', 'Europe/Lisbon');
$cal = new IntlGregorianCalendar(NULL, 'en_US');
$cal->set(2013, 6 /* July */, 7); // a Sunday 
var_dump($cal->isWeekend()); // true
var_dump($cal->isWeekend(strtotime('2013-07-01 00:00:00'))); // false, Monday
$cal = new IntlGregorianCalendar(NULL, 'ar_SA');
$cal->set(2013, 6 /* July */, 7); // a Sunday 
var_dump($cal->isWeekend()); // false, Sunday not in weekend in this calendar