回答編集履歴
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@@ -15,3 +15,323 @@
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コードを書いているときにリアルタイムに指摘してくれるので、こんな質問をしなくて済むようになりますよ、
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---
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```php
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<?php
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/**
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* index.php
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*
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* @since 2018/09/21
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*/
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function getCalendar(int $year, int $month)
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{
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$start = new DateTime();
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$start->setDate($year, $month, 1);
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$start->setTime(0, 0, 0);
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$w = $start->format('w');
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$start->sub(new DateInterval(sprintf('P%dD', $w)));
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$end = new DateTime();
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$end->setDate($year, $month + 1, 0);
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$end->setTime(0, 0, 0);
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$end->add(new DateInterval(sprintf('P%dD', 7 - $end->format('w'))));
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$arr = [];
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while ($start < $end) {
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$arr[] = [
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'date' => $start->format('Y-m-d')
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, 'y' => $start->format('Y')
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, 'm' => $start->format('n')
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, 'd' => $start->format('j')
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, 'week' => $start->format('w')
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];
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$start->add(new DateInterval('P1D'));
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}
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$prev = (new DateTime())->setDate($year, $month - 1, 1);
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$next = (new DateTime())->setDate($year, $month + 1, 1);
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return [
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'prev' => sprintf('?y=%d&m=%d', $prev->format('Y'), $prev->format('m'))
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, 'next' => sprintf('?y=%d&m=%d', $next->format('Y'), $next->format('m'))
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, 'calendar' => $arr
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];
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}
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$year = filter_input(INPUT_GET, 'y') ?? (new DateTime())->format('Y');
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$month = filter_input(INPUT_GET, 'm') ?? (new DateTime())->format('n');
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$calendar = getCalendar($year, $month);
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?>
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<!DOCTYPE HTML>
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<html lang="ja">
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<head>
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<meta charset="UTF-8">
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<title>カレンダー</title>
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<style type="text/css">
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.calendar {
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width: 300px;
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margin: 0 auto 2em;
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}
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.calendar td {
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text-align: center;
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}
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</style>
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</head>
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<body>
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<div class="calendar">
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<table>
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<thead>
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<tr>
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<th>
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<a href="<?php echo $calendar['prev'] ?>">«</a>
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</th>
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<th colspan="5">
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<?php printf('%d/%d', $year, $month); ?>
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</th>
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<th>
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<a href="<?php echo $calendar['next'] ?>">»</a>
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</th>
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</tr>
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<tr>
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<th>日</th>
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<th>月</th>
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<th>火</th>
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<th>水</th>
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<th>木</th>
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<th>金</th>
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<th>土</th>
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</tr>
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</thead
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<tbody>
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<?php foreach ($calendar['calendar'] as $dt) : ?>
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<?php if ($dt['week'] == 0) : ?>
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<tr>
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<?php endif; ?>
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<td>
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<a href="date.php?date=<?php echo $dt['date']; ?>">
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<?php echo $dt['d']; ?>
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</a>
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</td>
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<?php if ($dt['week'] == 6) : ?>
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</tr>
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<?php endif; ?>
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<?php endforeach; ?>
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</tbody>
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</table>
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</div>
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<div class="calendar">
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<form action="date.php" method="get">
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<table>
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<thead>
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<tr>
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<th>
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<a href="<?php echo $calendar['prev'] ?>">«</a>
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</th>
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<th colspan="5">
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<?php printf('%d/%d', $year, $month); ?>
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</th>
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<th>
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<a href="<?php echo $calendar['next'] ?>">»</a>
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</th>
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</tr>
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<tr>
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<th>日</th>
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<th>月</th>
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<th>火</th>
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<th>水</th>
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<th>木</th>
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<th>金</th>
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<th>土</th>
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</tr>
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</thead
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<tbody>
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<?php foreach ($calendar['calendar'] as $dt) : ?>
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<?php if ($dt['week'] == 0) : ?>
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<tr>
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<?php endif; ?>
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<td>
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<button name="date" value="<?php echo $dt['date']; ?>">
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<?php echo $dt['d']; ?>
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</button>
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</td>
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<?php if ($dt['week'] == 6) : ?>
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</tr>
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<?php endif; ?>
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<?php endforeach; ?>
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</tbody>
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</table>
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</form>
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</div>
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</body>
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</html>
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```
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