PHP5 像使用数组一样使用Memcache

作者:张立冰 出处:http://www.libing.name/2008/03/13/php5-memcache-array.html 我们经常使用Memcache来做数据的缓存,比如大的分布式的应用的会话数据的保存等,每次使用Memcache进行数据的操作都必须依赖于Memcache提供的API,对象的创建,方法的调用等,虽然

作者:张立冰
出处:http://www.libing.name/2008/03/13/php5-memcache-array.html

我们经常使用Memcache来做数据的缓存,比如大的分布式的应用的会话数据的保存等,每次使用Memcache进行数据的操作都必须依赖于Memcache提供的API,对象的创建,方法的调用等,虽然就几个API,使用起来也挺方便的,但再没有像使用数组这么方便来使用你的Memcache了.

At PHPClasses:http://www.phpclasses.org/browse/package/4071.html

在PHP5里,可以方便的帮我们实现了(基于SPL).几小时的工作,可能有些小BUG,欢迎反馈.:)

 /**
 * mem.class.php -- Class used to access memcache server as array.
 *
 * Written by roast (roast_AT_php_DOT_net).
 *
 * Feel free to email me with questions/bugs.
 * If you find this useful, would be great to hear from you.
 *
 * version 1.0 -
 *
 * Changes:
 *  - First release.
 *
 * Example:
 *
 *    include("mem.class.php");
 *
 *    //global variable $_MEM
 *
 *    $_MEM['dd'] = "roast";  //memcache::set
 *    unset($_MEM['dd']);     //memcache::delete
 *
 *    var_dump($_MEM['dd']);
 *
 * Notes:
 *  - Protect keys of memcache: _host/_port/_compress/_expire.
 *  - PHP version 5.0+
 */        

class _MEM implements ArrayAccess
{
private $_data = array();      

private $_handler = false;     

public  $_host;    

public  $_port = 11211;    

public  $_compress = false;    

public  $_expire = 30;         

public function __construct($host,$port = 11211)
{
$this->_host = $host;
$this->_port = $port;
$this->_handler = new Memcache;     

if (!$this->_handler->connect($host,$port))
$this->_handler = false;
}          

public function offsetExists($offset) {}       

public function offsetUnset($offset)
{
$this->_handler->delete($offset);
unset($this->_data[$offset]);
}      

public function offsetGet($offset)
{
if (!$this->_handler)
return false;
echo 'get';
if (isset($this->_data[$offset]))
return $this->_data[$offset];
else
return $this->_handler->get($offset);
}      

public function offsetSet($offset, $value)
{
if (!$this->_handler)
return false;      

switch ($offset)
{
case '_host':       $this->_host = $value;  break;
case '_port':       $this->_port = $value;  break;
case '_expire':     $this->_expire = $value;break;
case '_compress':   $this->_host = $value;  break;
default:
if (emptyempty($value) && $value != '0')
$this->_handler->delete($offset);
else
$this->_handler->set($offset,$value,$this->_compress,$this->_expire);
}
$this->_data[$offest] = $value;
}
}
$_MEM = new _MEM('10.210.71.51');

举个小例子:

include_once('mem.class.php')  ;       

$_MEM['dd'] = "roast";
unset($_MEM['dd']);               //delete a memcache value
var_dump($_MEM['dd']);                 

echo $_MEM->_host;
$_MEM['_host'] = '192.168.1.1';   //set the memcache server host
echo $_MEM->_host;      

$_MEM['roast'] = '张立冰';
$memcache = new Memcache;
$memcache->connect('10.210.71.51', 11211) or die ("Could not connect");
var_dump($memcache->get('roast'));

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