函数名称：给定日期，获取本周内的日期
参数说明：day： 给定的日期， week：是否显示星期， week_type：显示星期的格式

function week_day($day, $week = true, $week_type = 1){
  $week_arr = array( '1'=>'周一', '2'=>'周二', '3'=>'周三', '4'=>'周四', '5'=>'周五', '6'=>'周六', '7'=>'周日', );
  $week_arr2 = array( '1'=>'星期一', '2'=>'星期二', '3'=>'星期三', '4'=>'星期四', '5'=>'星期五', '6'=>'星期六', '7'=>'星期日', );
  $whichD = date('N',strtotime($day));
  $weeks = array();
  for($i = 1; $i <= 7; $i++){
    if($i < $whichD){
      $date = strtotime($day)-($whichD-$i)*24*3600;
    }else{
      $date = strtotime($day)+($i-$whichD)*24*3600;
    }
    $weeks[$i] = date('Y-m-d',$date);
    if($week == true){
      if($week_type == 1){
        $weeks[$i] .= ' '.$week_arr[$i];
      }else{
        $weeks[$i] .= ' '.$week_arr2[$i];
      }
    }
  }
  return $weeks;
}

使用说明：

print_r( week_day('2016-09-29', $week = true, $week_type = 1) );

输出值如下：