An event dispatcher in a tweet

Dispatch1.php

<?php

// Version 1

// Minified
// class Dispatch{function add($e,$l){$this->l[$e][]=$l;}function trigger($e,$d){foreach ($this->l[$e] as $l)call_user_func_array($l, $d);}}

class Dispatch{
    function add($e, $l) {
        $this->l[$e][] = $l;
    }

    function trigger($e, $d) {
        foreach ($this->l[$e] as $l) {
            call_user_func_array($l, $d);
        }
    }
}


class Greeter {
    public function greet($name) {
        echo "Hello $name\n";
    }
} 

$dispatch = new Dispatch();
$dispatch->add('greet', array(new Greeter, 'greet'));

$dispatch->trigger('greet', array('Bob'));

Dispatch2.php

<?php

// Version 2

// Minified
// class Dispatch{function add($e,$l){$this->l[$e][]=$l;}function trigger($e,$d){foreach($this->l[$e] as$l)$l($d);}}

class Dispatch {
 function add($e, $l) { $this->l[$e][]=$l; }
 function trigger($e, $d) { foreach ($this->l[$e] as $l) $l($d); }
}


$dispatch = new Dispatch();
$dispatch->add('greet', function ($name) {
    echo "Hello $name\n";
});

$dispatch->trigger('greet', 'Bob');

maybe you are interested on a something like a framework ... https://github.com/liuggio/sized140

Dependency injection container in a tweet ... https://gist.github.com/jm42/3c32dd50bb9d09f57c4a