Online PHP editor | rfc for psPpB

@ 2014-08-21T20:48:31Z

<?php

    class Observer {
        static protected $events = array();
        static public function register($callable, $event){
            if (!isset(self::$events[$event])) {
                self::$events[$event] = array();
            }
            self::$events[$event][] = $callable;
        }
        static public function notify($event, $params = array()) {
            if (isset(self::$events[$event])) {
                foreach (self::$events[$event] AS $callable){
                    call_user_func_array($callable, $params);
                }
            }
        }
    }

    function print_meta($p1, $p2) {
        echo $p1 . ' ' . $p2 . '<br />';
    }

    function multiply_meta($p1, $p2) {
        echo $p1 * $p2 . '<br />';
    }

    function add_meta($p1, $p2) {
        echo $p1 + $p2 . '<br />';
    }

    Observer::register('print_meta', 'event1');
    Observer::register('multiply_meta', 'event1');

    Observer::register('print_meta', 'event2');
    Observer::register('add_meta', 'event2');

    Observer::register('multiply_meta', 'event3');
    Observer::register('add_meta', 'event3');

    echo "Notifying of event 1 \r\n<br />";
    Observer::notify('event1', array(1, 2));
    echo "Notifying of event 2 \r\n<br />";    Observer::notify('event2', array(3, 4));
    echo "Notifying of event 3 \r\n<br />";    Observer::notify('event3', array(5, 6));

Output for git.master, git.master_jit, rfc.property-hooks: Notifying of event 1 1 2 2 Notifying of event 2 3 4 7 Notifying of event 3 30 11

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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