$date = new Zend_Date(); $date->subMonth(1); echo $date->get('Y-m-d');
$date = new Zend_Date('2022-04-30', 'YYYY-MM-DD'); $date->subMonth(1); echo $date->get('Y-m-d');This code creates a new Zend_Date object with the date "2022-04-30" and subtracts one month from it using the subMonth() method. The get() method is then used to format and output the resulting date in the format "YYYY-MM-DD". Based on the code examples, it can be determined that the package library used is Zend_Date.