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PHPエラー Warning: Cannot modify header information - headers already がでます。

Last updated at Posted at 2012-03-16

エラーが出ます。(Warning: Cannot modify header information - headers already sent by
on line 16 とon line 28が 同様のエラーで出ます・・・。)
コードは下記になります

time()) { // ログインしている $_SESSION['time'] = time(); $sql = sprintf('SELECT * FROM members WHERE id=%d', mysql_real_escape_string($_SESSION['id']) ); $record = mysql_query($sql) or die(mysql_error()); $member = mysql_fetch_assoc($record); } else { // ログインしていない header('Location:twitter.login.php'); } // 投稿を記録する if (!empty($_POST)) { if ($_POST['message'] != '') { $sql = sprintf('INSERT INTO posts SET member_id=%d, message="%s", reply_post_id=%d, created=NOW()', mysql_real_escape_string($member['id']), mysql_real_escape_string($_POST['message']), mysql_real_escape_string($_POST['reply_post_id']) ); mysql_query($sql) or die(mysql_error()); header('Location:twitter.index.php'); exit();} } // 投稿を取得する $page = $_REQUEST['page']; if ($page == '') { $page = 1; } $page = max($page, 1); // 最終ページを取得する $sql = 'SELECT COUNT(*) AS cnt FROM posts'; $recordSet = mysql_query($sql); $table = mysql_fetch_assoc($recordSet); $maxPage = ceil($table['cnt'] / 5); $page = min($page, $maxPage); $start = ($page - 1) * 5; $start = max(0, $start); $sql = sprintf('SELECT m.name, m.picture, p.* FROM members m, posts p WHERE m.id=p.member_id ORDER BY p.created DESC LIMIT %s, 5', $start ); $posts = mysql_query($sql) or die(mysql_error()); // 返信の場合 if (isset($_REQUEST['res'])) { $sql = sprintf('SELECT m.name, m.picture, p.* FROM members m, posts p WHERE m.id=p.member_id AND p.id=%d ORDER BY p.created DESC', mysql_real_escape_string($_REQUEST['res']) ); $record = mysql_query($sql) or die(mysql_error()); $table = mysql_fetch_assoc($record); $message = '@' . $table['name'] . ' ' . $table['message']; } // htmlspecialcharsのショートカット function h($value) { return htmlspecialchars($value, ENT_QUOTES, 'UTF-8'); } // 本文内のURLにリンクを設定します function h($value) { return htmlspecialchars($value, ENT_QUOTES, 'UTF-8'); } ?> ひとこと掲示板

ひとこと掲示板

さん、メッセージをどうぞ

<div class="msg">
<img src="member_picture/<?php echo h($post['picture']); ?>" width="48" height="48" alt="<?php echo h($post['name']); ?>" />
<p><?php echo makeLink(h($post['message'])); ?><span class="name">(<?php echo h($post['name']); ?>)</span>[<a href="index.php?res=<?php echo h($post['id']); ?>">Re</a>]</p>
<p class="day"><a href="view.php?id=<?php echo h($post['id']); ?>"><?php echo h($post['created']); ?></a>
0): ?>
<a href="view.php?id=<?php echo h($post['reply_post_id']); ?>">返信元のメッセージ</a>
[<a href="delete.php?id=<?php echo h($post['id']); ?>" style="color: #F33;">削除</a>]
</p>
</div>

(C) H2O Space. MYCOM

このエラーは、header("Location:~"); の前に何かしら出力してしまうと でてくるエラーらしいのですが、ちょっとわかりません。教えてくれないでしょうか?
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