memcache

Memcached with PHP.

Memcahced open source distributed memory object caching system it helps you to speeding up the dynamic web applications by reducing database server load. In this post I want to explain how I had implemented Memcached object caching system for  This system is very helpful for high traffic media and blog related websites.

Database
Sample database demos table contains id, title and link.

CREATE TABLE demos
(
id INT PRIMARY KEY AUTO_INCREMENT,
title VARCHAR(300),
link VARCHAR(300),
);

First User Request
First request goes to database server at the same time data object storing in Memcached server.

Second User Request
Second user request data comes from Memcached object.

Memcached Installation
Lots of better resources available on web please follow the links. php_memcache.dll
INSTALLING MEMCACHED ON AMAZON LINUX AMI - QUICK AND EASY.
INSTALLING MEMCACHED ON Windows.
install Memcached on Xampp on Windows 7
Memcached for PHP 5.3 on Windows 7.

index.php
Contains PHP code.

<?php
include('db.php');
$memcache = new Memcache;
$memcache->connect('localhost', 11211) or die ("Could not connect");

$key = md5('List 9lessons Demos'); // Unique Words
$cache_result = array();
$cache_result = $memcache->get($key); // Memcached object 

if($cache_result)
{
// Second User Request
$demos_result=$cache_result;
}
else
{
// First User Request 
$v=mysql_query("select * from demos order by id desc");
while($row=mysql_fetch_array($v))
$demos_result[]=$row; // Results storing in array
$memcache->set($key, $demos_result, MEMCACHE_COMPRESSED, 1200);
// 1200 Seconds
}

// Result
foreach($demos_result as $row)
{
echo '<a href='.$row['link'].'>'.$row['title'].'</a>';
}

?>

db.php
You have to change hostname, username, password and database name.

<?php
$mysql_hostname = "localhost";
$mysql_user = "username";
$mysql_password = "password";
$mysql_database = "database";
$bd = mysql_connect($mysql_hostname, $mysql_user, $mysql_password)
or die("Opps some thing went wrong");
mysql_select_db($mysql_database, $bd) or die("Opps some thing went wrong");
?>