Plugin Grundgeruest

index.php

<?php
/*** MOCKING ***/
function did_action( $hook ){
	
	static $calls = 0;
	
	return $calls++;
	
}

function add_action(){};
function register_activation_hook(){}
function register_deactivation_hook(){}
function register_uninstall_hook(){}
/*** MOCKING ENDE ***/



class TestPlugin
{
	/**
	 * 
	 * Constructor
	 */
	private function __construct(){
	
		echo 'Plugin started<br>';
		
	}
	
	/**
	 * 
	 * Registering the plugin on plugins_loaded and starting the plugin on WordPress startup
	 * @internal hooked by plugins_loaded
	 */
	public static function init_plugin(){
		
		switch( did_action( 'plugins_loaded' ) ){

			case 0:
				add_action(
					'plugins_loaded',
					array( __CLASS__, 'init_plugin' )
				);
				
				return TRUE;
			break;
			
			case 1:
				return new self();	
			break;
			
			default:
				return NULL;
			break;
			
		}		
	
		return;	
				
	}

	/**
	 * 
	 * Register the activation-, deactivation- and uninstall-hook
	 */
	public static function init_plugin_install( $abspath = __FILE__ ){
/*	
		if( ! class_exists( 'Plugin_Installer' ) )
			require_once 'classes/class-plugin_installer.php';
		// alternativ mit spl_autoloader
*/		
		register_activation_hook(	$abspath, array( 'Plugin_Installer', 'activate' ) );
		register_deactivation_hook(	$abspath, array( 'Plugin_Installer', 'deactivate' ) );
		register_uninstall_hook(	$abspath, array( 'Plugin_Installer', 'uninstall' ) );
		
	}
	
}

TestPlugin::init_plugin_install( __FILE__ );

$a = array();
$a[] = TestPlugin::init_plugin();
$a[] = TestPlugin::init_plugin();
$a[] = TestPlugin::init_plugin();
$a[] = TestPlugin::init_plugin();

var_dump( $a );