This is the Blogs class which gets the blogs from the db

<?php
/**
 * Here is the main class for the OO blog: this handles all of the logic
 * from opening and closing the connection to the database to retrieving
 * the posts from it.
 * Please see:
 * net.tutsplus.com/tutorials/php/how-to-create-an-object-oriented-blog-using-php/
 * for further information, or find me on the devshed.com forums if you have any
 * questions.
 * Put in a folder libraries and call this include.php - or set your own paths and
 * names that make more sense to you.
 *
 * @Author: Shaun B
 * @Date:   2012-10-24
 * @Todo:   This is currently doing everything that I want it to, however at some
 *      point, I will need to implement getting a single blog from a user,
 *      edit a users blog or just more logic to make it a more complete
 *      website.
 **/
include 'blogpost.php';
class Blogs {
    public $server;
    public $dbUser;
    public $password;
    public $database;
    public $connection;
    public $postArray;
    function __construct(){
        $server = null;
        $dbUser = null;
        $password = null;
        $database = null;
        $connection = null;
        $postArray = array();
    }
    // Connects to the database:
    function connect( $serv = null, $usr = null, $pwd = null, $db = null){
        if ( !$serv || !$usr || !$db ) {
            echo 'No database connection established.';
            return null;
        } else {
            $this->server = $serv;
            $this->dbUser = $usr;
            $this->password = $pwd;
            $this->database = $db;
            $this->connection = mysql_connect( $this->server, $this->dbUser, $this->password, $this->database );
            mysql_select_db( $this->database, $this->connection );
        }
    }
    // This will retrieve all of the blog posts from a database - it uses
    // inline SQL:
    function GetBlogPosts($inId=null, $inTagId =null) {
        if (!empty($inId)) {
            $query = mysql_query("SELECT * FROM blog_posts WHERE id = " . $inId . " ORDER BY id DESC");
        } else if (!empty($inTagId)) {
            $query = mysql_query("SELECT blog_posts.* FROM blog_post_tags LEFT JOIN (blog_posts) ON (blog_post_tags.postID = blog_posts.id) WHERE blog_post_tags.tagID =" . $tagID . " ORDER BY blog_posts.id DESC");
        } else {
            $query = mysql_query("SELECT * FROM blog_posts ORDER BY id DESC");
        }
        $this->postArray = array();
        while ($row = mysql_fetch_assoc($query)) {
            $myPost = new BlogPost();
            $myPost->getPost($row['id'], $row['title'], $row['post'], $row['author_id'], $row['date_posted']);
            array_push($this->postArray, $myPost);
        }
        return $this->postArray;
    }
    // Closes database connection when the object is obliterated:
    function __destruct() {
        if($this->connection) {
            mysql_close($this->connection);
        }
    }
}
?>