$date = new Zend_Date(); $date->addDay(1); echo $date->toString(); // Outputs tomorrow's date in the default format
$date = new Zend_Date('2022-01-01'); $date->addDay(-5); echo $date->toString(Zend_Date::ISO_8601); // Outputs 2021-12-27T00:00:00+00:00In this example, we create a new Zend_Date object with a specific date value of '2022-01-01'. We then call the addDay method with an argument of -5, which decrements the date by five days. Finally, we use the toString method with the Zend_Date::ISO_8601 format to output the updated date in ISO 8601 format. Based on the use of the Zend_Date package and its syntax, it can be clearly determined that it is a library package of the Zend Framework in PHP.