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[Laravel]Carbonで月初から月末まで何週あるか取得する

Last updated at Posted at 2020-09-24

週別の集計結果を表示する必要があったため忘れないようメモ。

サンプルコード

月初から月末まで何週あるかCarbonで取得。

$start = new Carbon()->firstOfMonth();
$end = new Carbon()->endOfMonth()

getWeekOfNumberInMonth($start, $end);
function getWeekOfNumberInMonth($start, $end) {
    $dt = $start->copy()->firstOfMonth();
    $week = 1;
    for($dt; $end >= $dt; $dt->addDay()) {
        if ($dt->isSunday() && $dt !== $start) $week++;
    }
    return $week;
}

FYI:
既出記事ですが取得ロジックを変えてやってます。
https://qiita.com/fabled/items/2607186731adc75f11e1

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