# 最終状態（仕上げ）
掲示板の完成状態のコードを掲載しておきます。
# index.php
~~/public/index.php
<?php
session_start();
require_once(__DIR__ . '/../src/db_connect.php');
if (isset($_POST['action_type']) && $_POST['action_type']) {
if ($_POST['action_type'] === 'insert') {
require(__DIR__ . '/../src/insert_message.php');
} elseif ($_POST['action_type'] === 'delete') {
require(__DIR__ . '/../src/delete_message.php');
}
}
require(__DIR__ . '/../src/session_values.php');
$stmt = $dbh->query('SELECT * FROM posts ORDER BY created_at DESC;');
$message_length = $stmt->rowCount();
function convertTz($datetime_text)
{
$datetime = new DateTime($datetime_text);
$datetime->setTimezone(new DateTimeZone('Asia/Tokyo'));
return $datetime->format('Y/m/d H:i:s');
}
?>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta name="robots" content="noindex" />
<title>ひとこと掲示板</title>
<link rel="stylesheet" href="./assets/main.css" />
</head>
<body>
<div class="page-cover">
<p class="page-title">ひとこと掲示板</p>
<hr class="page-divider" />
<?php if ($messages['action_success_text'] !== '') { ?>
<div class="action-success-area"><?php echo $messages['action_success_text']; ?></div>
<?php } ?>
<?php if ($messages['action_error_text'] !== '') { ?>
<div class="action-failed-area"><?php echo $messages['action_error_text']; ?></div>
<?php } ?>
<div class="form-cover">
<form action="/" method="post">
<div class="form-input-title">投稿者ニックネーム</div>
<input type="text" name="author_name" maxlength="40" value="<?php echo htmlspecialchars($messages['input_pre_author_name'], ENT_QUOTES); ?>" class="input-author-name" />
<?php if ($messages['input_error_author_name'] !== '') { ?>
<div class="form-input-error">
<?php echo $messages['input_error_author_name']; ?>
</div>
<?php } ?>
<div class="form-input-title">投稿内容<small>(必須)</small></div>
<textarea name="message" class="input-message"><?php echo htmlspecialchars($messages['input_pre_message'], ENT_QUOTES); ?></textarea>
<?php if ($messages['input_error_message'] !== '') { ?>
<div class="form-input-error">
<?php echo $messages['input_error_message']; ?>
</div>
<?php } ?>
<input type="hidden" name="action_type" value="insert" />
<button type="submit" class="input-submit-button">投稿する</button>
</form>
</div>
<hr class="page-divider" />
<div class="message-list-cover">
<small>
<?php echo $message_length; ?> 件の投稿
</small>
<?php while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) { ?>
<?php $lines = explode("\n", $row['message']); ?>
<div class="message-item">
<div class="message-title">
<div><?php echo htmlspecialchars($row['author_name'], ENT_QUOTES); ?></div>
<small><?php echo convertTz($row['created_at']); ?></small>
<div class="spacer"></div>
<form action="/" method="post" style="text-align:right">
<input type="hidden" name="id" value="<?php echo $row['id']; ?>" />
<input type="hidden" name="action_type" value="delete" />
<button type="submit" class="message-delete-button">削除</button>
</form>
</div>
<?php foreach ($lines as $line) { ?>
<p class="message-line"><?php echo htmlspecialchars($line, ENT_QUOTES); ?></p>
<?php } ?>
</div>
<?php } ?>
</div>
</div>
</body>
</html>
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# main.css
~~/src/assets/main.css
@charset "utf-8";
@import url(https://fonts.googleapis.com/css2?family=Roboto:wght@100;300;400;500;700;900&display=swap);
@import url(https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@300;400;500;700;900&display=swap);
/* ===== BASIC BEGIN ===== */
html,
body {
background-color: #eef3f4;
font-family: Roboto, 'Noto Sans JP', sans-serif;
color: #585858;
margin: 0;
padding: 0;
}
a {
color: #3280e7;
text-decoration: none;
}
a:hover {
text-decoration: underline;
}
button,
input,
textarea {
font-family: inherit;
box-sizing: border-box;
}
button {
background-color: initial;
border: initial;
cursor: pointer;
outline: initial;
padding: initial;
appearance: initial;
-webkit-appearance: none;
border-radius: initial;
font-size: inherit;
}
p {
margin: 0;
padding: 0;
}
/* ===== BASIC END ===== */
/* ===== PAGE PARTS BEGIN ===== */
.page-cover {
max-width: 800px;
margin: 0 auto;
}
.page-title {
text-align: center;
padding: 10px 0;
margin: 0 auto;
font-weight: bold;
font-size: 25px;
}
.page-divider {
width: 80%;
max-width: 500px;
margin: 0 auto 20px auto;
height: 2px;
background-color: rgba(0, 0, 0, 0.2);
border: none;
}
/* ===== PAGE PARTS END ===== */
/* ===== NOTIFICATION AREA BEGIN ===== */
.action-success-area {
width: max-content;
margin: 10px auto;
padding: 5px 15px;
color: #388e3c;
border: solid 2px #388e3c;
border-radius: 4px;
}
.action-failed-area {
width: max-content;
margin: 10px auto;
padding: 5px 15px;
color: #bb1850;
border: solid 2px #bb1850;
border-radius: 4px;
}
/* ===== NOTIFICATION AREA END ===== */
/* ===== NEW MESSAGE FORM AREA BEGIN ===== */
.form-cover {
margin: 0 auto;
width: 90%;
}
.form-input-title {
font-size: 0.875rem;
padding: 10px;
}
.form-input-error {
color: #bb1850;
font-size: 0.875rem;
padding: 0 10px;
}
.input-author-name {
font-size: 16px;
width: 100%;
height: 2em;
border: 1px solid rgba(236, 234, 234, 0.5);
border-radius: 5px;
box-sizing: border-box;
}
.input-message {
font-size: 16px;
width: 100%;
border: 1px solid rgba(236, 234, 234, 0.5);
border-radius: 5px;
height: 100px;
width: 100%;
box-sizing: border-box;
resize: vertical;
min-height: 100px;
max-height: 500px;
}
.input-submit-button {
background-color: #333333;
border: 2px solid #333333;
color: #ffffff;
margin: 15px auto;
padding: 5px;
display: block;
border-radius: 5px;
width: 100%;
max-width: 200px;
}
.input-submit-button:hover {
background-color: #ffffff;
border: 2px solid #59b1eb;
color: #59b1eb;
}
/* ===== NEW MESSAGE FORM AREA END ===== */
/* ===== MESSAGE LIST AREA BEGIN ===== */
.message-list-cover {
margin: 0 auto;
width: 90%;
}
.message-item {
background-color: #ffffff;
margin-bottom: 16px;
padding: 8px 16px;
overflow-wrap: break-word;
border-radius: 4px;
}
.message-title {
display: flex;
flex-direction: column;
gap: 0 10px;
border-bottom: 1px solid rgba(0, 0, 0, 0.1);
margin-bottom: 4px;
}
.message-title .spacer {
flex-grow: 1;
}
@media screen and (min-width: 500px) {
.message-title {
flex-direction: row;
align-items: end;
}
}
.message-line {
min-height: 1em;
}
.message-delete-button {
color: #3280e7;
min-width: max-content;
}
.message-delete-button:hover {
text-decoration: underline;
}
/* ===== MESSAGE LIST AREA END ===== */
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# insert_message
~~/src/insert_message.php
<?php
/**
* 両端の空白を除去する関数です。マルチバイトを含みます。
* 参考 https://qiita.com/fallout/items/a13cebb07015d421fde3
*/
function mbTrim($pString)
{
return preg_replace('/\A[\p{Cc}\p{Cf}\p{Z}]++|[\p{Cc}\p{Cf}\p{Z}]++\z/u', '', $pString);
}
// 入力値を確認する（投稿者）
$is_valid_auther_name = true;
$input_author_name = '';
if (isset($_POST['author_name'])) {
$input_author_name = mbTrim(str_replace("\r\n", "\n", $_POST['author_name']));
$_SESSION['input_pre_author_name'] = $_POST['author_name'];
} else {
$is_valid_auther_name = false;
}
if ($is_valid_auther_name && mb_strlen($input_author_name) > 30) {
$is_valid_auther_name = false;
$_SESSION['input_error_author_name'] = 'ニックネームは 30 文字以内で入力してください。（現在 ' . mb_strlen($input_author_name) . ' 文字）';
}
// 入力値を確認する（投稿内容）
$is_valid_message = true;
$input_message = '';
if (isset($_POST['message'])) {
$input_message = mbTrim(str_replace("\r\n", "\n", $_POST['message']));
$_SESSION['input_pre_message'] = $_POST['message'];
} else {
$is_valid_message = false;
}
if ($is_valid_message && $input_message === '') {
$is_valid_message = false;
$_SESSION['input_error_message'] = '投稿内容の入力は必須です。';
}
if ($is_valid_message && mb_strlen($input_message) > 1000) {
$is_valid_message = false;
$_SESSION['input_error_message'] = '投稿内容は 1000 文字以下で入力してください。（現在 ' . mb_strlen($input_message) . ' 文字）';
}
// 投稿をデータベースへ保存する処理
if ($is_valid_auther_name && $is_valid_message) {
if ($input_author_name === '') {
$input_author_name = '匿名さん';
}
// INSERT クエリを作成する
// :author_name、:message はプレースホルダという。後で $stmt->bindValue を使用して値をセットするときのニックネームのようなもの。自分で決められる。
$query = 'INSERT INTO posts (author_name, message) VALUES (:author_name, :message)';
// SQL 実行の準備 (実行はされない)
$stmt = $dbh->prepare($query);
// プレースホルダに値をセットする
$stmt->bindValue(':author_name', $input_author_name, PDO::PARAM_STR);
$stmt->bindValue(':message', $input_message, PDO::PARAM_STR);
// クエリを実行する
$stmt->execute();
$_SESSION['action_success_text'] = '投稿しました';
$_SESSION['action_error_text'] = '';
$_SESSION['input_error_author_name'] = '';
$_SESSION['input_error_message'] = '';
$_SESSION['input_pre_author_name'] = '';
$_SESSION['input_pre_message'] = '';
} else {
$_SESSION['action_success_text'] = '';
$_SESSION['action_error_text'] = '入力内容を確認してください';
}
header('Location: /');
exit();
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# delete_message
~~/src/delete_message
<?php
if (isset($_POST['id']) && $_POST['id']) {
$stmt = $dbh->prepare('DELETE FROM posts WHERE id = :id');
$stmt->bindValue(':id', $_POST['id'], PDO::PARAM_INT);
$stmt->execute();
$_SESSION['action_success_text'] = '削除が完了しました';
$_SESSION['action_error_text'] = '';
} else {
$_SESSION['action_success_text'] = '';
$_SESSION['action_error_text'] = 'id がありません';
}
header('Location: /');
exit();
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# session_values.php
~~/src/session_values.php
<?php
// ページ内で使用する変数を初期化する
$messages['action_success_text'] = '';
$messages['action_error_text'] = '';
$messages['input_error_author_name'] = '';
$messages['input_error_message'] = '';
$messages['input_pre_author_name'] = '';
$messages['input_pre_message'] = '';
// ページ内で使用する変数にセッションから代入する
if (isset($_SESSION['action_success_text'])) {
$messages['action_success_text'] = $_SESSION["action_success_text"];
unset($_SESSION["action_success_text"]);
}
if (isset($_SESSION['action_error_text'])) {
$messages['action_error_text'] = $_SESSION["action_error_text"];
unset($_SESSION["action_error_text"]);
}
if (isset($_SESSION['input_error_author_name'])) {
$messages['input_error_author_name'] = $_SESSION["input_error_author_name"];
unset($_SESSION["input_error_author_name"]);
}
if (isset($_SESSION['input_error_message'])) {
$messages['input_error_message'] = $_SESSION["input_error_message"];
unset($_SESSION["input_error_message"]);
}
if (isset($_SESSION['input_pre_author_name'])) {
$messages['input_pre_author_name'] = $_SESSION["input_pre_author_name"];
unset($_SESSION["input_pre_author_name"]);
}
if (isset($_SESSION['input_pre_message'])) {
$messages['input_pre_message'] = $_SESSION["input_pre_message"];
unset($_SESSION["input_pre_message"]);
}
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# db_connect.php
~~/src/db_connect.php
<?php
try {
if (getenv('JAWSDB_URL')) {
// Heorku (JawsDB)
$_url = parse_url(getenv('JAWSDB_URL'));
$dbHost = $_url['host'];
$dbPort = $_url['port'];
$dbName = ltrim($_url['path'], '/');
$dbUser = $_url['user'];
$dbPass = $_url['pass'];
} else {
// Other (Local development)
$dbHost = getenv('DB_HOST');
$dbPort = getenv('DB_PORT');
$dbName = getenv('DB_NAME');
$dbUser = getenv('DB_USER');
$dbPass = getenv('DB_PASS');
}
$dsn = "mysql:dbname=$dbName;host=$dbHost:$dbPort";
$dbh = new PDO($dsn, $dbUser, $dbPass);
} catch (PDOException $e) {
echo 'データベース接続失敗:';
echo $e->getMessage();
exit();
}
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