ArrayAccess creates an array-like object

/**

* Singleton mode implementation class -->ArrayAccess (array access) interface

*

* @author flyer0126

* @since 2012/4/27

*/

class Single{

private $name;

private static $_Instance = null;

private function __construct()

{

}

static function load()

{

if(null == self::$_Instance)

{

self::$_Instance = new Single();

}

return self::$_Instance;

}

public function setName($name)

{

$this->name = $name;

}

public function getName()

{

return $this->name;

}

}

$s = Single::load();

$s->setName("jack");

echo $s->getName(); //jack

// 调整一下（继承ArrayAccess && 实现4个方法）

class Single implements ArrayAccess

{

private $name;

private static $_Instance = null;

private function __construct()

{

}

static function load()

{

if(null == self::$_Instance)

{

self::$_Instance = new Single();

}

return self::$_Instance;

}

public function setName($name)

{

$this->name = $name;

}

public function getName()

{

return $this->name;

}

/**

                                                                                                                                    to ’ s

  ’ ’ s ’ s ’ s to 1's ’         out out out out off out out through through ‐ to ‐ ‐ ‐ ‐ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ‐ ​ ​ ​ ​ ​Value

                                                                                                                              */

public function offsetSet($offset, $value) 

{

if (is_null($offset)) 

{

$this->container[] = $value;

} 

else 

{

$this->container[$offset] = $value;

}

}

return isset($this->container[$offset]) ? $this->container[$offset] : null;

}

return isset($this->container[$offset]);

}

unset($this->container[$offset]);

}

}

print_r($s);

/**

Single Object

(

    [name:Single:private] => jack

    [container] => Array

        (

            [name] => mike

        )