ArrayAccess creates a class array object

* ** Singleton mode implementation class -- & amp; gt; ArrayAccess (array-based access) interface ** @ authorflyer0126 * @ since2012427 * classSingle {pr .../**

* 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

// Adjust It (inherit from ArrayAccess & implement 4 methods)

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;

}

/**

* Four implementation methods

* OffsetExists (), used to identify whether an element has been defined

* OffsetGet () is used to return the value of an element.

* OffsetSet (), used to set a new value for an element

* OffsetUnset () is used to delete an element and corresponding values.

**/

Public function offsetSet ($ offset, $ value)

{

If (is_null ($ offset ))

{

$ This-> container [] = $ value;

}

Else

{

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

}

}

Public function offsetGet ($ offset)

{

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

}

Public function offsetExists ($ offset)

{

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

}

Public function offsetUnset ($ offset)

{

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

}

}

$ S = Single: load ();

$ S-> setName ("jack ");

$ S ["name"] = "mike ";

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

Echo $ s ["name"]; // mike

Print_r ($ s );

/**

Single Object

(

[Name: Single: private] => jack

[Container] => Array

(

[Name] => mike

)

)

**/