Singleton Pattern in PHP5

Written by Garry Lachman (Admin). Posted on February 25, 2010. Filed under PHP + mySQL. Tagged , , , , , , , , . Bookmark the Permalink. Post a Comment. Leave a Trackback URL.

Singleton is very basic design pattern.
If the instance is inited once than the class return the same instance.

Example of signleton in php5

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<?
Class SingletonExample {
  static private $instance;

  private function __construct() {
  }

  static function getInstance() {
    if(!Self::$instance) {
      Self::$instance = new SingletonExample();
    } else {
      return Self::$instance
    }
  }

  public function doHello() {
     return "Hello World";
   }
?>

Usage Example:

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<?
include_once("singleton.class.php");

$single = SingletonExample::getInstance();
echo $single->doHello(); //return "Hello World"
?>
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3 Comments

  1. Jon
    Posted March 4, 2010 at 3:17 pm | Permalink

    Congrats on your blog.

    Consider looking at this before you choose to use the Singleton pattern:

    http://moisadoru.wordpress.com/2010/03/02/static-call-versus-singleton-call-in-php/

    Reply
  2. Jon
    Posted March 10, 2010 at 10:08 pm | Permalink

    Don’t forget to read this before you go and implement a Singleton pattern:

    http://moisadoru.wordpress.com/2010/03/02/static-call-versus-singleton-call-in-php/

    Reply
  3. admin
    Posted April 12, 2010 at 1:42 am | Permalink

    Thanks Jon ;)

    Reply

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