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select.php
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<?php
include('functions.php');
// ユーザーidの指定（今回は固定値）
$user_id = 1;
//DB接続
$pdo = connectToDb();
// taskごとのいいね数カウント確認
// $sql = 'SELECT task_id, COUNT(id) AS cnt FROM like_table GROUP BY task_id';
// $stmt = $pdo->prepare($sql);
// $status = $stmt->execute();
// if ($status == false) {
// showSqlErrorMsg($stmt);
// } else {
// $result = $stmt->fetchAll(); // fetchAll()で全件取得
// var_dump($result);
// exit();
// }
//データ表示SQL作成
// $sql = 'SELECT * FROM php02_table';
$sql = 'SELECT * FROM php02_table LEFT OUTER JOIN (SELECT task_id, COUNT(id) AS cnt FROM like_table GROUP BY task_id) AS likes ON php02_table.id = likes.task_id';
$stmt = $pdo->prepare($sql);
$status = $stmt->execute();
//データ表示
$view = '';
if ($status == false) {
showSqlErrorMsg($stmt);
} else {
while ($result = $stmt->fetch(PDO::FETCH_ASSOC)) {
$view .= '<li class="list-group-item">';
$view .= '<p>' . $result['deadline'] . '-' . $result['task'] . '</p>';
// いいねボタン
$view .= '<a href="like_insert.php?task_id=' . $result['id'] .
'&user_id=' . $user_id . '" class="badge badge-success">Like ' . $result['cnt'] . '</a>';
$view .= '<a href="detail.php?id=' . $result['id'] . '" class="badge badge-primary">Edit</a>';
$view .= '<a href="delete.php?id=' . $result['id'] . '" class="badge badge-danger">Delete</a>';
$view .= '</li>';
}
}
?>
<!DOCTYPE html>
<html lang="ja">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>todoリスト表示</title>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/css/bootstrap.min.css" integrity="sha384-GJzZqFGwb1QTTN6wy59ffF1BuGJpLSa9DkKMp0DgiMDm4iYMj70gZWKYbI706tWS" crossorigin="anonymous">
<style>
div {
padding: 10px;
font-size: 16px;
}
</style>
</head>
<body>
<header>
<nav class="navbar navbar-expand-lg navbar-light bg-light">
<a class="navbar-brand" href="#">todo一覧</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarNav">
<ul class="navbar-nav">
<li class="nav-item">
<a class="nav-link" href="index.php">todo登録</a>
</li>
<li class="nav-item">
<a class="nav-link" href="select.php">todo一覧</a>
</li>
</ul>
</div>
</nav>
</header>
<div>
<ul class="list-group">
<?= $view ?>
</ul>
</div>
</body>
</html>