Cache Content to Speed Up Slow Loading Web Pages

<?php 
 
require_once 'Zend/Cache.php';
 
$cache = Zend_Cache::factory
(
	'Page' // frontend caching method
	, 'File'
	, array('lifetime'=>3600)
	, array('cache_dir'=>$_SERVER['DOCUMENT_ROOT'] . '/cache')
);
 
$cache->start('uniquePageName');
 
// PAGE CONTENT
 
?>

<?php 
 
require_once 'Zend/Cache.php';
 
$cache = Zend_Cache::factory
(
	'Output' // frontend caching method
	, 'File'
	, array('lifetime'=>3600)
	, array('cache_dir'=>$_SERVER['DOCUMENT_ROOT'] . '/cache')
);
 
if (!($cache->start('uniqueContentName'))) 
{
	// PAGE CONTENT
 
	$cache->end(); // output buffering ends
}
 
// DYNAMIC PAGE CONTENT
 
?>

<?php 
 
function fooBar()
{
	require_once 'Zend/Cache.php';
 
	$cache = Zend_Cache::factory
	(
		'Core' // frontend caching method
		, 'File'
		, array('lifetime'=>3600,'automatic_serialization' => TRUE)
		, array('cache_dir'=>$_SERVER['DOCUMENT_ROOT'] . '/cache')
	);
 
	$cache_id = 'uniqueFunctionName';
 
	$rows = $cache->load($cache_id);
 
	if (!$rows)
	{
		$rows = array();
 
		// FUNCTION CONTENT
 
		$cache->save($rows, $cache_id);
	}
 
	return $rows;
}
 
?>

static function getSubscriberCounts()
{
	require_once 'Zend/Cache.php';
 
	$cache = Zend_Cache::factory
	(
		'Core'
		, 'File'
		, array
		(
			'lifetime' => 3600
			,'automatic_serialization' => TRUE
		)
		, array
		(
			'cache_dir' => SP_CACHE_LOCATION
		)
	);
 
	$cache_id = 'Bundle_getSubscriberCounts';
 
	$rows = $cache->load($cache_id);
 
	// check if rows were cached
	if (!$rows)
	{
		$rows = array();
 
		$sql =
		"
			SELECT
				b.bundle_id
				, COUNT(DISTINCT bs.user_id) AS subscriber_count
 
			FROM
				bundle_subscriptions AS bs
 
				INNER JOIN bundles AS b
					ON b.bundle_id = bs.bundle_id
 
				INNER JOIN users AS u
					ON u.user_id = bs.user_id
					AND u.role != 'temp'
 
			GROUP BY
				b.bundle_id
		";
 
		$result = @mysql_query($sql);
 
		if ($result)
		{
			while($row = @mysql_fetch_assoc($result))
			{
				// use id as key to be able to do faster lookups
				$rows[$row['bundle_id']] = $row['subscriber_count'];
			}
 
			@mysql_free_result($result);
 
			// generate a table to provide other methods and queries a JOIN
 
			$tb = 'gen_bundle_subscriber_counts';
 
			@mysql_query("DROP TABLE IF EXISTS `$tb`");
 
			$sql_create =
			"
				CREATE TABLE `$tb`
				(
					`bundle_id` int(11) unsigned NOT NULL DEFAULT '0'
					, `subscriber_count` int(10) NOT NULL DEFAULT '0'
					, PRIMARY KEY (`bundle_id`)
				) TYPE=MyISAM;
			";
 
			@mysql_query($sql_create);
 
			$sql = 'INSERT INTO `' . $tb . '` ' . $sql;
 
			@mysql_query($sql);
 
			$cache->save($rows, $cache_id);
		}
	}
 
	return $rows;
}