PHP design pattern Adapter (Adapter pattern)_PHP tutorial

/**
* Adapter pattern
*
* Convert the interface of a class into another interface that the customer wants, using classes that are originally incompatible and cannot work together to work together
*/

// 这个是原有的类型
class OldCache
{
public function __construct()
{
echo "OldCache construct
";
}

public function store($key,$value)
{
echo "OldCache store
";
}

public function remove($key)
{
echo "OldCache remove
";
}

public function fetch($key)
{
echo "OldCache fetch
";
}
}

interface Cacheable
{
public function set($key,$value);
public function get($key);
public function del($key);
}

class OldCacheAdapter implements Cacheable
{
private $_cache = null;
public function __construct()
{
$this->_cache = new OldCache();
}

public function set($key,$value)
{
return $this->_cache->store($key,$value);
}

public function get($key)
{
return $this->_cache->fetch($key);
}

public function del($key)
{
return $this->_cache->remove($key);
}
}

$objCache = new OldCacheAdapter();
$objCache->set("test",1);
$objCache->get("test");
$objCache->del("test",1);