/*
 * 獲取日期對(duì)應(yīng)的星期
 * 參數(shù)$date為輸入的日期數(shù)據(jù)，格式如：2018-6-22
 */
function get_week($date)
{
  //強(qiáng)制轉(zhuǎn)換日期格式
  $date_str = date('Y-m-d', strtotime($date));
  //封裝成數(shù)組
  $arr = explode("-", $date_str);
  //參數(shù)賦值
  //年
  $year = $arr[0];
  //月，輸出2位整型，不夠2位右對(duì)齊
  $month = sprintf('%02d', $arr[1]);
  //日，輸出2位整型，不夠2位右對(duì)齊
  $day = sprintf('%02d', $arr[2]);
  //時(shí)分秒默認(rèn)賦值為0；
  $hour = $minute = $second = 0;
  //轉(zhuǎn)換成時(shí)間戳
  $strap = mktime($hour, $minute, $second, $month, $day, $year);
  //獲取數(shù)字型星期幾
  $number_wk = date("w", $strap);
  //自定義星期數(shù)組
  $weekArr = array("0", "1", "2", "3", "4", "5", "6");
  //獲取數(shù)字對(duì)應(yīng)的星期
  return $weekArr[$number_wk];
}
/**
 * 獲取一周日期
 * @param $time 時(shí)間戳
 * @param $format 轉(zhuǎn)換格式
 */
function get_week($time, $format = "Y-m-d") {
  $week = date('w',$time);
  $weekname=array('星期一','星期二','星期三','星期四','星期五','星期六','星期日');
  //星期日排到末位
  if(empty($week)){
    $week=7;
  }
  for ($i=0;$i<=6;$i++){
  　　$data[$i]['date'] = date($format,strtotime( '+'. $i+1-$week .' days',$time));
  　　$data[$i]['week'] = $weekname[$i];
  }
  return $data;
}
/*
 * 獲取某星期的開(kāi)始時(shí)間和結(jié)束時(shí)間
 * time 時(shí)間
 * first 表示每周星期一為開(kāi)始日期 0表示每周日為開(kāi)始日期
 */
function getWeekMyActionAndEnd($time = '', $first = 1)
{
  //當(dāng)前日期
  if (!$time) $time = time();
  $sdefaultDate = date("Y-m-d", $time);
  //$first =1 表示每周星期一為開(kāi)始日期 0表示每周日為開(kāi)始日期
  //獲取當(dāng)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(kāi)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(jié)束日期
  $week_end = date('Y-m-d', strtotime("$week_start +6 days"));
  return array("week_start" => $week_start, "week_end" => $week_end);
}