system/classes/method.php

<?php
namespace Habari;

class Method
{
  public $class;
  public $method;

  public static function create($class, $method) {
    $instance = new Method($class, $method);
    return $instance;
  }

  public function __construct($class, $method) {
    $this->class = $class;
    $this->method = $method;
  }

  public function exists() {
    return function_exists($this->method_array());
  }

  public static function dispatch($method, $multiple_optional_args = null)
  {
    $args = func_get_args();
    array_shift($args);  // Take $method off the front, pass only args
    return self::dispatch_array($method, $args);
  }

  public static function dispatch_array($method, $args = array())
  {
    if(is_callable($method)) {
      return call_user_func_array($method, $args);
    }
    elseif(is_string($method)) {
      array_unshift($args, $method, false);
      return call_user_func_array(Method::create('\Habari\Plugins', 'filter'), $args);
    }
    return false;
  }

  public function method_array()
  {
    // Try the \Habari namespace if the class doesn't exist and the \Habari namespace works
    if(!is_object($this->class) && strpos($this->class, '\\') === false && !class_exists($this->class, true)) {
      if(class_exists('\\Habari\\' . $this->class)) {
        $this->class = '\\Habari\\' . $this->class;
      }
    }
    return array($this->class, $this->method);
  }

  public function __invoke() {

    $args = func_get_args();
    return call_user_func_array($this->method_array(), $args);
  }
}