PHP design mode Series-Strategy mode

• Policy mode:

The policy pattern design helps to build an object that does not have to contain logic on its own, but can leverage the algorithms in other objects as needed.

• Usage scenarios:

1. For example, there is a CD class, and our class stores the information for the CD.
2. Originally, we called the Getcd method directly in the CD class to give the results of the XML
3. As the business expands, the demand side presents the need for JSON data format output
4. This time we introduced a strategy model that allows the user to freely choose whether to export XML or JSON based on demand.

• code example:

<?PHP//Policy mode//CD class    classCD {protected $CDARR;  Public function__construct ($title,$info) {               $this->cdarr[' title '] =$title; $this->cdarr[' info '] =$info; }                     Public functionGETCD ($TYPEOBJ) {              return $TYPEOBJ->get ($this-Cdarr); }       }            classJSON { Public functionGet$return _data) {              returnJson_encode ($return _data); }      }            classXML { Public functionGet$return _data) {                  $xml= ' <?xml version= ' 1.0 ' encoding= ' utf-8 '?> '; $xml. = ' <return> '; $xml. = ' <data> '.Serialize($return _data). ' </data> '; $xml. = ' </return> '; return $xml; }      }            $CD=NewCD (' Cd_1 ', ' cd_1 '); Echo $CD-&GT;GETCD (NewJSON); Echo $CD-&GT;GETCD (NewXML);

Transferred from: http://blog.csdn.net/initphp/article/details/7760383

PHP design mode Series-Strategy mode