Tutorial System

Wolphie · November 24, 2007

Ok, so i'm writing a tutorial system with comments etc...

But i'm having trouble getting the comments to work, basically what i want to do is:

Someone selects a tutorial, and within that same tutorial page it will list the comments assigned to the tutorials ID.

The comment form will be displayed beneath the comments them selves and when a comment is submitted i want

that to go back to the tutorial page which the comment was added to.

This is what i have so far:

<?php

$host	= 'localhost';
$user	= 'root';
$pass	= '';
$db		= '';

$con		= mysql_connect($host, $user, $pass);

if($con)
{
mysql_select_db($db);
}
else
{
die('Error: ' . mysql_error());
}


$id = $_REQUEST['id'];

if(isset($id))
{
$view_tut 	= 	mysql_query(sprintf("SELECT * FROM `tutorial` WHERE `ID` = '%s'", $id))
						or die('Error: ' . mysql_error());

while($row = mysql_fetch_array($view_tut))
{
	echo '
				<table cellpadding="0" cellspacing="0">
					<tr>	
						<td><a href="view.php?id=' . $id . '">' . $row['title'] . '</a><span style="padding-left: 15px; font-size: 10px;">- ' . $row['author'] . '</span></td>
					</tr>
					<tr>
						<td style="font-size: 10px; font-style: italic;">Posted on: ' . $row['date'] . '</td>
					</tr>
					<tr>
						<td style="padding-top: 10px;">' . $row['content'] . '</td>
					</tr>
				</table>
			';
}

$comments	=	mysql_query(sprintf("SELECT * FROM `comments` WHERE `tut_id` = '%s' ORDER BY `ID` DESC LIMIT 20", $id))
						or die('Error: ' . mysql_error());	

	echo '
				<table cellpadding="0" cellspacing="0" style="margin-top: 50px;" width="200">
					<tr>
						<td style="font-size: 20px; font-style: bold;"><u>Comments</u></td>
					</tr>
				</table>
			';

while($row = mysql_fetch_array($comments))
{		
	echo '
				<table cellpadding="0" cellspacing="0" width="200">
					<tr>
						<td style="padding-top: 15px;">' . $row['title'] . '<span style="padding-left: 15px; font-size: 10px;">- ' . $row['author'] . '</span></td>
					</tr>
					<tr>
						<td style="font-size: 10px; font-style: italic;">Posted on: ' . $row['date'] . '</td>
					</tr>
					<tr>
						<td style="padding-top: 10px;  padding-bottom: 5px; border-bottom: 1px solid #CCCCCC;" width="100%">' . $row['content'] . '</td>
					</tr>
				</table>
			';
}


switch($_GET['do'])
{
	default:
		echo '
					<form action="?do=addcomment" method="post">
					<table cellpadding="0" cellspacing="0" style="margin-top: 50px;" width="200">
						<tr>
							<td style="font-size: 20px; font-style: bold;">Add Comment</td>
						</tr>
						<tr>
							<td style="padding-top: 15px;">Title:</td>
						</tr>
						<tr>
							<td><input type="text" name="title" /></td>
						</tr>
						<tr>
							<td>Author:</td>
						</tr>
						<tr>
							<td><input type="text" name="author" /></td>
						</tr>
						<tr>
							<td>Content:</td>
						</tr>
						<tr>
							<td><textarea cols="50" rows="10" name="content"></textarea></td>
						</tr>
						<tr>
							<td><input type="submit" value="Add" /></td>
						</tr>
					</table>
					</form>
				';
		break;

	case 'addcomment':

		$title			=	mysql_escape_string(htmlspecialchars(stripslashes($_POST['title'])));
		$author		=	mysql_escape_string(htmlspecialchars(stripslashes($_POST['author'])));
		$date 			= 	mysql_escape_string(date('m-d-Y'));
		$content		= 	mysql_escape_string(nl2br(htmlspecialchars(stripslashes($_POST['content']))));
		$tut_id			= mysql_escape_string($id);

		mysql_query(sprintf("INSERT INTO `comments` ( `title`, `author`, `date`, `content`, `tut_id` ) 
		VALUES ( '%s', '%s', '%s', '%s', '%d' )", $title, $author, $date, $content, $tut_id)) 
		or die('Error: ' . mysql_error());

		echo '<head><script type="text/javascript">window.location = "view.php?id=' . $id . '";</script></head>';

		break;
}				
}
else
{
$view		= 	mysql_query(sprintf("SELECT * FROM `tutorial` ORDER BY `ID` DESC"))
					or die('Error: ' . mysql_error());

while($row = mysql_fetch_array($view))
{
	echo '
				<table cellpadding="0" cellspacing="0">
					<tr>
						<td style="padding-top: 15px;"><a href="view.php?id=' . $row['ID'] . '">' . $row['title'] . '</a><span style="padding-left: 15px; font-size: 10px;">- ' . $row['author'] . '</span></td>
					</tr>
					<tr>
						<td style="padding-top: 10px;">' . $row['description'] . '</td>
					</tr>
				</table>
			';
}
}



?>

0x00 · November 24, 2007

Once the comment has successfully been posted into the database, (you should already have the tutorial id), use the id to display the appropriate page. This can be done by including the tutorial page used to display it, or by redirecting using 'header()', http://uk3.php.net/manual/en/function.header.php

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