PHP Tutorial: Blog(Including commenting)
Posted: Sat Jun 09, 2012 4:24 pm
Hey there.
I have a problem with blog_list.php
I did everything like Jacek did in his tutorials.
But when I try blog_list.php I see(I know it sais that 'body' is undefined, but I tried with preview and I get the same message):
blog_list.php
posts.inc.php:
comments.in.php:
I have a problem with blog_list.php
I did everything like Jacek did in his tutorials.
But when I try blog_list.php I see(I know it sais that 'body' is undefined, but I tried with preview and I get the same message):
- php.png (31.31 KiB) Viewed 1447 times
<?php
include('core/init.inc.php');
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Agata Filipiuk</title>
</head>
<body>
<div>
<?php
$posts=get_posts();
foreach ($posts as $post){
// linkowanie tytułu, użytkownika, i il kom
?><center>
<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'];?> komentarze, ostatni komentarz <?php echo $post['last_comment'];?> )</h4>
<hr />
<p><?php echo $post['preview]; ?></p>
<?php
}
?>
</center>
</div>
</body>
</html>
The line 26 is:
<p><?php echo $post['preview]; ?></p>I'm also including other files:
posts.inc.php:
<?php
//sprawdza, czy dany post id jest w db
function valid_pid($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;
}
}
//zbiera wszystkie posty
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){
//wskazniki
$rows[]=array(
'id' =>$row['id'],
'title' =>$row['title'],
'user' =>$row['user'],
'date' =>$row['date'],
'total_comments' =>($row['total_comments']===null) ? 0: $row['total_comments'],//sprawdzamy czy są komentarze
'last_comment' =>($row['last_comment']===null) ? 'never': $row['last_comment']
);
}
return $rows;
}
//zbiera poj posty
function get_post($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);
echo mysql_error();
$post=mysql_fetch_assoc($post);
$post['comments'] = get_comments($pid);
return $post;
}
//dodaje nowy post
function add_post($name, $title, $body){
$name = mysql_real_escape_string(htmlentities($name));
$title = mysql_real_escape_string(htmlentities($title));
$body = mysql_real_escape_string(nl2br(htmlentities($body)));
mysql_query("INSERT INTO `posts` (`post_user`, `post_title`, `post_body`, `post_date`) VALUES ('{$name}', '{$title}', '{$body}', NOW())");
}
?>
comments.in.php:
<?php
//zwraca wszystkie komentarze do postu
function get_comments($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[] = $row;
}
return $return;
}
//dodaje komentarz
function add_comment($pid, $user, $body){
//spr czy koment istenieje
if
(valid_pid($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;
}
?>