Add Action and Do Action for any system using Globals. Inspired by Wordpress but custom Coded.

add_do_action.php

<?php
// Queue: Queues a function or object method to be run during do_action
function add_action($action, $function, $priority = 10, $args = array()){
    $GLOBALS['actions'][$action][$priority][] = array('function' => $function, 'args' => $args);
}
// Hook: Runs a function or a object method based on add_action
function do_action($action){
    $done = '';
    if(!empty($GLOBALS['actions'][$action])):
        foreach($GLOBALS['actions'][$action] as $priorities):
            foreach($priorities as $do):
                if(is_array($do['function'])):
                    $object = $do['function'][0];
                    $method = $do['function'][1];
                    if(method_exists($object, $method)):
                        if(!empty($do['args'])):
                            $done .= call_user_func_array( array($object, $method), $do['args'] );
                        else:
                            $done .= $object->$method();
                        endif;
                        if(!empty($done)) $done .= PHP_EOL;
                    endif;
                else:
                    $function = $do['function'];
                    if(function_exists($function)):
                      if(!empty($do['args'])):
                            $done .= call_user_func_array( $function , $do['args'] );
                        else:
                            $done .= $function();
                        endif;
                        if(!empty($done)) $done .= PHP_EOL;
                    endif;
                endif;
            endforeach;
        endforeach;
    endif;
    if(!empty($done)) echo $done;
}