php獲取日期是當月第幾周的方法：首先創建一個PHP示例文件；然后通過“date('d', $time)-(8 – $wk_day);echo $day<=0 ? 1:ceil($day / 7)+1;”獲取當天是本月第幾周。

本文操作環境：windows7系統、PHP7.1版，DELL G3電腦

php怎么獲取日期是當月第幾周？

PHP獲取日期在月份里屬于第幾周，最簡單的獲取當天是本月第幾周

<?php $time = strtotime('2019-01-01'); $wk_day = date('w', strtotime(date('Y-m-1 00:00:00', $time))) ? : 7; //今天周幾 $day = date('d', $time) - (8 - $wk_day); //今天幾號 echo $day <= 0 ? 1 : ceil($day / 7) + 1; //計算是第幾個星期   print_r(week_of_month(strtotime('2019-01-1')));   function week_of_month($time, $offset = 1){         $week = get_week_block($time);         $wk_day = date('w', strtotime(date('Y-m-1 00:00:00', $time))) ? : 7; //今天周幾         $day = date('d', $time) - (8 - $wk_day); //今天幾號         $weekof = $day <= 0 ? 1 : ceil($day / 7) + 1; //計算是第幾個星期         if($offset){             $week[0] = date('Y-m-d', max(strtotime(date('Y-m-1 00:00:00', $time)), $week[0]));             $week[1] = date('Y-m-d', min(strtotime(date('Y-m-'.date('t', $time).' 23:59:59', $time)), $week[1]));         }else{             $week[0] = date('Y-m-d', $week[0]);             $week[1] = date('Y-m-d', $week[1]);         }         return ['week' => $week, 'weekof' => $weekof]; }   function get_week_block($sdefaultDate = false, $first = 1){ //當前日期     //$first =1 表示每周星期一為開始日期 0表示每周日為開始日期   if(!$sdefaultDate)$sdefaultDate = time(); if(is_numeric($sdefaultDate))$sdefaultDate = date('Y-m-d', $sdefaultDate); //獲取當前周的第幾天 周日是 0 周一到周六是 1 - 6   $w=date('w', strtotime($sdefaultDate));   //獲取本周開始日期，如果$w是0，則表示周日，減去 6 天   $week_start=date('Y-m-d',strtotime("$sdefaultDate -".($w ? $w - $first : 6).' days'));   //本周結束日期   $week_end=date('Y-m-d',strtotime("$week_start +6 days")); return array(strtotime($week_start.' 00:00:00'), strtotime($week_end.' 23:59:59')); }

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