Memcached PHP Memcached + APC + file cache encapsulation Implementation code

How to use:
Memcached

Copy the Code code as follows:

$cache = new Cache_memcache ();
$cache->addserver (' www1 ');
$cache->addserver (' www2 ', 11211,20); This server has double the memory, and gets double the weight
$cache->addserver (' www3 ', 11211);
Store some data in the cache for ten minutes
$cache->store (' My_key ', ' foobar ', 600);
Get it out of the cache again
Echo ($cache->fetch (' My_key '));

File cache

Copy the Code code as follows:

$cache = new Cache_file ();
$key = ' Getusers:selectall ';
Check if the data is not in the cache already
if (! $data = $cache->fetch ($key)) {
Assuming there is a database connection
$result = mysql_query ("SELECT * from users");
$data = Array ();
Fetching all the data and putting it in an array
while ($row = Mysql_fetch_assoc ($result)) {$data [] = $row;}
Storing the data in the cache for ten minutes
$cache->store ($key, $data, 600);
}

Download: class_cache3.php

Copy the Code code as follows:

Abstract class Cache_abstract {
Abstract function Fetch ($key);
Abstract function Store ($key, $data, $ttl);
Abstract function Delete ($key);
}
Class Cache_apc extends Cache_abstract {
function Fetch ($key) {
Return Apc_fetch ($key);
}
function Store ($key, $data, $ttl) {
Return Apc_store ($key, $data, $ttl);
}
function Delete ($key) {
Return Apc_delete ($key);
}
}
Class Cache_memcache extends Cache_abstract {
Public $connection;
function __construct () {
$this->connection = new MemCache;
}
function Store ($key, $data, $ttl) {
return $this->connection->set ($key, $data, 0, $ttl);
}
function Fetch ($key) {
return $this->connection->get ($key);
}
function Delete ($key) {
return $this->connection->delete ($key);
}
function Addserver ($host, $port = 11211, $weight = 10) {
$this->connection->addserver ($host, $port, True, $weight);
}
}
Class Cache_file extends Cache_abstract {
function Store ($key, $data, $ttl) {
$h = fopen ($this->getfilename ($key), ' A + ');
if (! $h)
throw new Exception (' Could not write to cache ');
Flock ($h, LOCK_EX);
Fseek ($h, 0);
Ftruncate ($h, 0);
$data = Serialize (Array (time () + $ttl, $data));
if (fwrite ($h, $data) = = = = False) {
throw new Exception (' Could not write to cache ');
}
Fclose ($h);
}
function Fetch ($key) {
$filename = $this->getfilename ($key);
if (!file_exists ($filename))
return false;
$h = fopen ($filename, ' R ');
if (! $h)
return false;
Flock ($h, lock_sh);
$data = file_get_contents ($filename);
Fclose ($h);
$data = @ unserialize ($data);
if (! $data) {
Unlink ($filename);
return false;
}
if (Time () > $data [0]) {
Unlink ($filename);
return false;
}
return $data [1];
}
function Delete ($key) {
$filename = $this->getfilename ($key);
if (file_exists ($filename)) {
Return unlink ($filename);
}
else {
return false;
}
}
Private Function GetFileName ($key) {
Return '/tmp/s_cache '. MD5 ($key);
}
}
?>

The above describes the Memcached php Memcached + APC + file cache encapsulation implementation code, including the Memcached aspect of the content, I hope to be interested in PHP tutorial friends helpful.

