php中計(jì)算離生日還剩下多少天？

/生日倒計(jì)時(shí)$birthday = "2017-12-29";date_default_timezone_set("PRC")

;//今天的時(shí)間戳$today = time()

;echo "今天是".date("Y-m-d",$today).""

;//生日時(shí)間戳$bstamp = strtotime($birthday)

;//倒計(jì)時(shí)多少天$rev = ceil(($bstamp-$today)/(24*3600))

;echo "距離您的生日還有".$rev."天";