<?php/** * 获取给定日期的前一天 * @param string $date * @return string $yesterday */function getYesterday($date){ if(empty($date)) { $yesterday = date("Y-m-d",strtotime("-1 day")); }else{ $arr = explode('-', $date); $year = $arr[0]; $month = $arr[1]; $day = $arr[2]; $unixtime = mktime(0,0,0,$month,$day,$year)-86400; $yesterday = date('Y-m-d',$unixtime); } return $yesterday;}
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