Easy to use memcache proxy class for php

mem.class.php

<?php
/* 
    Memcache Proxy Class for data
    Furkan Mustafa, 2013.05
    use it.

    usage:
    
    $dataUsedTooMuch = mem::cache('myhandle', 30, function() {
        return db::query('SELECT CRAZY SLOW SQL SCRIPT');
    });
*/

class mem {
    public static $conn = false;
    public static $server = '127.0.0.1';
    public static $prefix = 'myKeyPrefix_';
    
    public static function forceConnection() {
        if (self::$conn) return true;
        if (!self::$server) return false;
        if (!class_exists('Memcache')) return false;
        self::$conn = new Memcache();
        
        $addressParts = explode(':', self::$server);
        $port = (count($addressParts) > 1) ? array_pop($addressParts) : 11211;
        
        $host = implode(':', $addressParts);
        self::$conn->addServer($host, $port);
        
        return true;
    }
    public static function get($name) {
        if (!self::forceConnection()) return null;
        return self::$conn->get(self::$prefix.$name);
    }
    public static function set($name, $var, $ttl = 300) {
        if (!self::forceConnection()) return $var;
        self::$conn->set(self::$prefix.$name, $var, 0, $ttl);
        return $var;
    }
    public static function cache($name, $ttl, $block) {
        $var = self::get($name);
        if ($var) {
            return $var;
        }
        $var = $block();
        if (!$var) return $var;
        self::set($name, $var, $ttl);
        return $var;
    }
    
    public static function close() {
        if (self::$conn)
            self::$conn->close();
    }
}