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私のデータベースには、「投稿」テーブル（投稿された投稿を含む）と「返信」テーブル（すべての投稿への返信をすべて含む）があります。投稿を元の投稿のIDに投稿するにはどうすればよいですか？
ユーザーが投稿に返信すると、返信を含むデータベースの行にも元の投稿のIDが含まれます。
post_idの値を除いてすべてがすべて入力されていますが、すべてのエントリがゼロです。これをどうすれば解決できますか？
home.php：
<?php
// top_content.php includes the database connection file.
include "top_content.php";
// Include our script to convert MySQL timestamp to 'ago' format.
include "time_ago.php";
// Create an object for the time conversion functions
$timeAgoObject = new convertToAgo;
include "menu_and_logo.php";
// Query the database for all submitted posts. //
$sql = "SELECT * FROM Posts ORDER BY date DESC";
// Store the result in a variable. //
$res = mysqli_query($db, $sql) or die(mysqli_error);
// Check that the result has > 0 rows; that at least one post exists in the database. //
if(mysqli_num_rows($res) != 0) {
// The mysqli_fetch_array retrieves and returns the next row of our query, which is then assigned to $row. //
// Then it executes the echos, and the procedure begins anew. This is how we get the post list. //
while($row = mysqli_fetch_array($res)) {
// Set the post_id variable equal to the post_id of each post. //
$post_id = $row['post_id'];
$ts = $row['date'];
$post_title = $row['post_title'];
$post_creator = $row['post_creator'];
// Convert Date Time
$convertedTime = ($timeAgoObject -> convert_datetime($ts));
// Then convert to 'ago' time
$when = ($timeAgoObject -> makeAgo($convertedTime));
// Display the data of each row. THe while row will execute all posts, creating a list
// display.
echo '<div>';
// The text is set as the post title, and points to post.php?id=*the post_id of the post. //
// In post.php, we check that $_GET['id'] is set (that the user is visiting post.php?id=some_integer),
// then query the database for the respective post, and echo the relevant content. //
echo '<a href="post.php?id='.$post_id.'">'.$post_title.'</a>';
echo '<p>by <a href = "view_profile.php?user='.$post_creator.'">'.$post_creator.'</a> '.$when.'</p>';
echo '</div>';
}
}else {
echo "There are no posts.";
}
?>
post.php：
<!DOCTYPE html>
<?php
session_start();
// Include our script to convert MySQL timestamp to 'ago' format.
include "time_ago.php";
// Create an object for the time conversion functions
$timeAgoObject = new convertToAgo;
// Iniate connection to the database.
include "db_connect.php";
// Check that the user is visiting post.php?id=some_integer).
if($_GET['id']) {
// Set the post id as a variable, for convenience.
$post_id = $_GET['id'];
// Query the database for the post that corresponds to the post-title link that has been clicked.
$sql = "SELECT * FROM Posts WHERE post_id = '".$post_id."' ";
$res = mysqli_query($db, $sql)or die(mysqli_error());
// Check that there exists a row containing the relevant post id.
if(mysqli_num_rows($res) != 0) {
// Store the current row's array of data as a variable.
while($row = mysqli_fetch_array($res)) {
// Set the current row's data as variables.
$post_title = $row['post_title'];
$post_content = $row['post_content'];
$post_creator = $row['post_creator'];
$ts = $row['date'];
// Convert Date Time
$convertedTime = ($timeAgoObject -> convert_datetime($ts));
// Then convert to ago time
$when = ($timeAgoObject -> makeAgo($convertedTime));
// Display the relevant post data.
echo '<h2>'.$post_title.'</h2>';
echo '<p>Submitted by <a href = "view_profile.php?user='.$post_creator.'">'.$post_creator.'</a> '.$when.'</p><nr><br>';
echo ''.$post_content.'';
}
}else{
echo "This post does not exist.";
}
}else{
header("home.php");
}
?>
<!-- I've moved the html tags here because the file needs the $post_title variable before setting the title -->
<html>
<head><title><?php echo ''.$post_title.' - Lboro Maths'; ?></title></head>
<body>
<!-- #2: The form where users can submit replies to the original post. -->
<form action="reply_parse.php" method="POST">
<input type="textarea" name="reply_content" placeholder="Post a reply...">
<input type="submit" name="submit_reply" value="Reply">
</form>
</body>
</html>
reply_parse.php：私たちは隠しフィールドを挿入し、それを変数に渡すために必要な
<?php
session_start();
include "db_connect.php";
$post_id = $_GET['id'];
$reply_content = $_POST['reply_content'];
$reply_creator = $_SESSION['username'];
$date = date('y-m-d H:i:s');
if(isset($_POST['submit_reply'])) {
$sql = "INSERT INTO Replies (post_id, reply_content, reply_creator, reply_date) VALUES ('$post_id', '$reply_content', '$reply_creator', '$date')";
$res = mysqli_query($db, $sql)or die(mysqli_error);
header("Location: home.php");
}else{
echo "Fail.";
}
?>
IDが取得している値を確認するには、このコードを呼び出すコードを確認する必要があります。 –
お詫び申し上げます。私の編集は十分ですか？ – Callum
ブラウザで、Webページを右クリックし、「ソースコード」を選択します。 –