README

Common programing patterns for evo

• Singleton (trait and interface)
• Multiton (trait and interface)

If you don't know what a Singlton is I suggest reading about it

https://en.wikipedia.org/wiki/Singleton_pattern

Singleton useage

use evo\pattern\singleton\SingletonTrait;
use evo\pattern\singleton\SingletonInterface;

Class Foo implements SingletonInterface{
    use Singleton;
    protected function init(){
       //stuff to do on __construct
    }
}

Then you can call your class like this (each additional call will return the same instance of the class)

$Foo = Foo:getInstance();

Multiton usage

use evo\pattern\singleton\MultitonTrait;
use evo\pattern\singleton\MultitonInterface;
 
 Class Foo implements MultitonInterface{
     use Multiton;
     protected function init(){
        //stuff to do on __construct
     }
 }

Then you can call your class like this

$Foo = Foo:getInstance();

The diffrence between them is the Multiton acts more like a container for Singlton instances. So you can call the getInstance method multiple times with diffrent aliases and get multiple copies of the class, each a singleton in it's own right. Becareful using Static proprites on multitons as they can be a bit tricky.

//this will produce two singleton instances of the class
$Foo1 = Foo:getInstance('instance1');
$Foo2 = Foo:getInstance('instance2');

Install via composer

{
    "require" : {
        "evo/patterns" : "~1.0"
    }
}

I plan to add a few more to this, as needed.