php date日期加減

寫了那麼久的php我到今天才發現原來日期的增減這麼簡單！ 看到之前自己寫的函式才發現自己真的很蠢！哈 ```php $currentDate = date("Y-m-d");// current date echo "Current Date: ".$currentDate; $date30DaysAdded = date('Y-m-d', strtotime("+30 days")); echo "30 Days added: ".$date30DaysAdded; $date10YearsBack = date('Y-m-d', strtotime("-10 years")); echo "10 Years back: ".$date10YearsBack; $date2DaysAdded = date('Y-m-d', strtotime("+2 days")); echo "2 Days Added: ".$date2DaysAdded; ```