Blog and Commenting Tutorial Help.
Posted: Tue Mar 20, 2012 2:04 am
I have been following your tutorial for the blogging and commenting system and I have run into some problems along the way that I was able to get fixed but now I am running into a problem even though everything seems error free. Now I am not getting any MySQL or PHP errors so I am wondering what is the problem. I will post all my files except for init.inc.php because it contains my database credentials. I am not exactly sure what part of the tutorial I am on but I am pretty sure it is the final one.
So my problem is that when I load my the blog_read page everything seems normal but for the comment section it just says By on and does not list the comment I inputted through phpMyAdmin. It does say that there is one comment it just does not show it.
blog_read.php
So my problem is that when I load my the blog_read page everything seems normal but for the comment section it just says By on and does not list the comment I inputted through phpMyAdmin. It does say that there is one comment it just does not show it.
blog_read.php
<?php
include('core/init.inc.php');
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML `.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
<head>
<meta http-equiv="Content-Type" content="text/html"; charset=utf-8" />
<title>Blog</title>
</head>
<body>
<div>
<?php
if (isset($_GET['pid']) === false || valid_pid($_GET['pid']) === false){
echo 'Invalid post ID. Please contact a admin.';
}else{
$post = get_post($_GET['pid']);
?>
<h2><?php echo $post['title']; ?></h2>
<h4>By <?php echo $post['user']; ?> on <?php echo $post['date']; ?> (<?php echo count($post['comments']); ?> comments)</h4>
<hr />
<p><?php echo $post['body']; ?></p>
<hr />
<?php
foreach ($post['comments'] as $comment){
?>
<h4>By <?php echo $comment['user']; ?> on <?php echo $comment['date']; ?></h4>
<p><?php echo $comment['body']; ?></p>
<hr />
<?php
}
?>
<form action="" method="post">
<p>
<label for="user">Name</label>
<input type="text" name="user" id="user" />
</p>
<p>
<textarea name="body" rows="20" cols="60"></textarea>
</p>
<p>
<input type="submit" value="Add Comment" />
</p>
</form>
<?php
}
?>
</div>
</body>
</html>
posts.inc.php
<?php
// checks if the given post id is in the table.
function valid_pid($pid){
$pid = (int)$pid;
$total = mysql_query("SELECT COUNT(`post_id`) FROM `posts` WHERE `post_id` = {$pid}");
$total = mysql_result($total, 0);
if ($total != 1){
return false;
}else{
return true;
}
}
// fetches a summary of all the blog posts.
function get_posts(){
$sql = "SELECT
`posts`.`post_id` AS `id`,
`posts`.`post_title` AS `title`,
LEFT(`posts`.`post_body`, 512) AS `preview`,
`posts`.`post_user` AS `user`,
DATE_FORMAT(`posts`.`post_date`, '%d/%m/%Y %H:%i:%s') AS `date`,
`comments`.`total_comments`,
DATE_FORMAT(`comments`.`last_comment`, '%d/%m/%Y %H:%i:%s') AS `last_comment`
FROM `posts`
LEFT JOIN (
SELECT
`post_id`,
COUNT(`comment_id`) AS `total_comments`,
MAX(`comment_date`) AS `last_comment`
FROM `comments`
GROUP BY `post_id`
) AS `comments`
ON `posts`.`post_id` = `comments`.`post_id`
ORDER BY `posts`.`post_date` DESC";
$posts = mysql_query($sql);
$rows = array();
while (($row = mysql_fetch_assoc($posts)) !== false){
$rows[] = array(
'id' => $row['id'],
'title' => $row['title'],
'preview' => $row['preview'],
'user' => $row['user'],
'date' => $row['date'],
'total_comments'=> ($row['total_comments'] === null) ? 0 : $row['total_comments'],
'last_comment' => ($row['last_comment'] === null) ? 'never' : $row['last_comment']
);
}
return $rows;
}
// fetches a single post from the table.
function get_post($pid){
$pid = (int)$pid;
$sql = "SELECT
`post_title` AS `title`,
`post_body` AS `body`,
`post_user` AS `user`,
`post_date` AS `date`
FROM `posts`
WHERE `post_id` = {$pid}";
$post = mysql_query($sql);
$post = mysql_fetch_assoc($post);
$post['comments'] = get_comments($pid);
return $post;
}
// adds a new blog entry.
function add_post($name, $title, $body){
$name = mysql_real_escape_string(htmlentities($name));
$title = mysql_real_escape_string(htmlentities($title));
$name = mysql_real_escape_string(nl2br(htmlentities($body)));
mysql_query("INSERT INTO `posts` (`post_user`, `post_title`, `post_body`, `post_date`) VALUES ('{$name}', '{$title}', '{$body}', NOW())");
}
?>
blog_list.php
<?php
include('core/init.inc.php');
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML `.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content Type" content="text/html; charset=utf-8" />
<title>Blog</title>
</head>
<body>
<div>
<?php
$posts = get_posts();
foreach ($posts as $post){
?>
<h2><a href="blog_read.php?pid=<?php echo $post['id']; ?>"><?php echo $post['title']; ?></a></h2>
<h4>By <?php echo $post['user']; ?> on <?php echo $post['date']; ?></h4>
<h4>(<?php echo $post['total_comments']; ?> comments, last comment <?php echo $post['last_comment']; ?>)</h4>
<hr />
<p><?php echo $post['preview']; ?></p>
<?php
}
?>
</div>
</body>
</html>
comments.inc.php
<?php
// fetches all of the comments for a given blog post.
function get_comments($pid){
$pid = (int)$pid;
$sql = "SELECT
`comment_body` AS `body`,
`comment_user` AS `user`,
DATE_FORMAT(`comment_date`, '%d/%m/%Y %H:%i:%s') AS `date`
FROM `comments`
WHERE `post_id` = {$pid}";
$comments = mysql_query($sql);
$return = array();
while (($row = mysql_fetch_assoc($comments)) !== false){
$return[] = $rows;
}
return $return;
}
// adds a comment.
function add_comment($pid, $user, $body){
if (valid_pid($pid) === false){
return false;
}
$pid = (int)$pid;
$user = mysql_real_escape_string(htmlentities($user));
$body = mysql_real_escape_string(nl2br(htmlentities($body)));
mysql_query("INSERT INTO `comments` (`post_id`, `comment_user`, `comment_body`, `comment_date`) VALUES ({$pid}, '{$user}', '{$body}', NOW())");
return true;
}
?>
blog_post.php
<?php
include('core/init.inc.php');
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML `.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content Type" content="text/html; charset=utf-8" />
<title>Blog</title>
</head>
<body>
<form action="" method="post">
<p>
<label for="user">Name</label>
<input type="text" name="user" id="user" />
</p>
<p>
<label for="title">Title</label>
<input type="text" name="title" id="title">
</p>
<p>
<input type="submit" value="Add Post" />
</p>
</form>
</body>
</html>
Thanks for all the help