PHP code example of fergusinlondon / events

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

fergusinlondon / events example snippets

use FergusInLondon\Events\Registry;
use FergusInLondon\Events\Handler;

$registry = new Registry();

$registry->registerHandler("user.creation", new Handler(function($user){
	$this->container->get('email')->sendWelcome( $user->email_address );
}));

$registry->registerHandler("", new Handler(function($user){
    $this->container->get('logger')->info(
    	sprintf("New user registration: %s (%d)", $user->name, $user->id)
    );
}));

class UserController {
	public function create() {
		// ...
		$user->save();
		$registry->trigger("user.creation", $user);
	
	}
}

use FergusInLondon\Events\Registry;
use FergusInLondon\Events\Handler;

$registry = new Registry();

// As Handler objects are - by default - initialised with a Callable parameter. This is overridable via subclassing.
$registry->registerHandler("event.demo", new Handler(function(){
    echo "See, this is a very simple event handler.\n";
}));
$registry->registerHandler("event.never", new Handler(function(){
    echo "This will never run, as we'll clear all handlers first.\n";
}));

// Handlers can be instantiated inline, and access parameters passed in via Registry::trigger()
$userDeleteHandler = new Handler(function($name, $id){
    printf("User created: %s (%d)\n", $name, $id);
});

// Handlers also gain the context of the Handler object. Especially useful if you need to subclass and/or access utility methods.
$userCreateHandler = new Handler(function($name, $id){
	printf("User created: %s (%d)\n", $name, $id);
	printf(
	    "Handlers have access to the current Handler object too. (i.e %s)",
	    $this->registryIdentifier
	);
});


// Registering instantiated handlers.
$registry->registerHandler("user.create", $userCreateHandler);
$registry->registerHandler("user.delete", $userDeleteHandler);

// The clearHandlers method is capable of
$registry->trigger("event.demo");
$registry->clearHandlers("event.demo");
$registry->trigger("event.demo");

// It's possible to trigger events whilst passing data to the handler
$user = ["name" => "J. Smith", "id" => 101];
$registry->trigger("user.create", $user);
$registry->trigger("user.delete", $user);

// If clearHandlers is called without any parameters, all handlers are cleared
$registry->clearHandlers();
$registry->trigger("event.never");