PHP获取本周所有日期或者最近七天所有日期的方法

/**
 * 获取本周所有日期
 */
function get_week($time = '', $format='Y-m-d'){
  $time = $time != '' ? $time : time();
  //获取当前周几
  $week = date('w', $time);
  $date = [];
  for ($i=1; $i<=7; $i++){
    $date[$i] = date($format ,strtotime( '+' . $i-$week .' days', $time));
  }
  return $date;
}

print_r(get_week());
Array
(
  [1] => 2018-06-18
  [2] => 2018-06-19
  [3] => 2018-06-20
  [4] => 2018-06-21
  [5] => 2018-06-22
  [6] => 2018-06-23
  [7] => 2018-06-24
)

/**
 * 获取最近七天所有日期
 */
function get_weeks($time = '', $format='Y-m-d'){
  $time = $time != '' ? $time : time();
  //组合数据
  $date = [];
  for ($i=1; $i<=7; $i++){
    $date[$i] = date($format ,strtotime( '+' . $i-7 .' days', $time));
  }
  return $date;
}

print_r(get_weeks());
Array
(
  [1] => 2018-06-13
  [2] => 2018-06-14
  [3] => 2018-06-15
  [4] => 2018-06-16
  [5] => 2018-06-17
  [6] => 2018-06-18
  [7] => 2018-06-19
)