How do I Paginate my CMS - php

Question

I've been following the Build a CMS in an Afternoon tutorial at http://www.elated.com/articles/cms-in-an-afternoon-php-mysql/ .
The CMS works great but the only thing it's lacking is pagination. The article archive displays the list of all of the articles that are in the database, but I want to be able to separate these into pages. I've attempted it a few times but can never seem to get it to work. Clicking on a next page link usually brings me back to the homepage.
I will apreciate your help
Code:
config.php
<?php ini_set( "display_errors", true );
date_default_timezone_set("europe/lisbon" );
define( "DB_DSN", "mysql:host=localhost;dbname=cms" );
define( "DB_USERNAME", "username" );
define( "DB_PASSWORD", "password" );
define( "CLASS_PATH", "classes" );
define( "TEMPLATE_PATH", "templates" );
define( "HOMEPAGE_NUM_ARTICLES", 5 );
define( "ADMIN_USERNAME", "admin" );
define( "ADMIN_PASSWORD", "mypass" );
require( CLASS_PATH . "/Article.php" );
function handleException( $exception ) {
echo "Sorry, a problem occurred. Please try later.";
error_log( $exception->getMessage() ); }
set_exception_handler( 'handleException' ); ?>
archive.php
<?php include "templates/include/header.php" ?>
<h1>Article Archive</h1>
<ul id="headlines" class="archive">
<?php foreach ( $results['articles'] as $article ) { ?>
<li>
<h2>
<span class="pubDate"><?php echo date('j F Y', $article->publicationDate)?></span><?php echo htmlspecialchars( $article->title )?>
</h2>
<p class="summary"><?php echo htmlspecialchars( $article->summary )?></p>
</li>
<?php } ?>
</ul>
<p><?php echo $results['totalRows']?> article<?php echo ( $results['totalRows'] != 1 ) ? 's' : '' ?> in total.</p>
<p>Return to Homepage</p>
<?php include "templates/include/footer.php" ?>
article.php
<?php
/**
* Class to handle articles
*/
class Article
{
public $id = null;
public $publicationDate = null;
public $title = null;
public $summary = null;
public $content = null;
public function __construct( $data=array() ) {
if ( isset( $data['id'] ) ) $this->id = (int) $data['id'];
if ( isset( $data['publicationDate'] ) ) $this->publicationDate = (int) $data['publicationDate'];
if ( isset( $data['title'] ) ) $this->title = preg_replace ( "/[^\.\,\-\_\'\"\#\?\!\:\$ a-zA-Z0-9()]/", "", $data['title'] );
if ( isset( $data['summary'] ) ) $this->summary = preg_replace ( "/[^\.\,\-\_\'\"\#\?\!\:\$ a-zA-Z0-9()]/", "", $data['summary'] );
if ( isset( $data['content'] ) ) $this->content = $data['content'];
}
public function storeFormValues ( $params ) {
// Store all the parameters
$this->__construct( $params );
// Parse and store the publication date
if ( isset($params['publicationDate']) ) {
$publicationDate = explode ( '-', $params['publicationDate'] );
if ( count($publicationDate) == 3 ) {
list ( $y, $m, $d ) = $publicationDate;
$this->publicationDate = mktime ( 0, 0, 0, $m, $d, $y );
}
}
}
public static function getById( $id ) {
$conn = new PDO( DB_DSN, DB_USERNAME, DB_PASSWORD );
$sql = "SELECT *, UNIX_TIMESTAMP(publicationDate) AS publicationDate FROM articles WHERE id = :id";
$st = $conn->prepare( $sql );
$st->bindValue( ":id", $id, PDO::PARAM_INT );
$st->execute();
$row = $st->fetch();
$conn = null;
if ( $row ) return new Article( $row );
}
public static function getList( $numRows=1000000, $order="publicationDate DESC" ) {
$conn = new PDO( DB_DSN, DB_USERNAME, DB_PASSWORD );
$sql = "SELECT SQL_CALC_FOUND_ROWS *, UNIX_TIMESTAMP(publicationDate) AS publicationDate FROM articles
ORDER BY " . mysql_escape_string($order) . " LIMIT :numRows";
$st = $conn->prepare( $sql );
$st->bindValue( ":numRows", $numRows, PDO::PARAM_INT );
$st->execute();
$list = array();
while ( $row = $st->fetch() ) {
$article = new Article( $row );
$list[] = $article;
}
// Now get the total number of articles that matched the criteria
$sql = "SELECT FOUND_ROWS() AS totalRows";
$totalRows = $conn->query( $sql )->fetch();
$conn = null;
return ( array ( "results" => $list, "totalRows" => $totalRows[0] ) );
}
?>

Answer 1

You need to modify your code to $_GET the page number and use limit and offset in the query
you can see this example
http://www.tutorialspoint.com/php/mysql_paging_php.htm