PHP-Hooks

Standalone Hook / Event helper library for PHP

Basic Usage:

Hook::add('my_hook', function($message){
  echo $message;
});
Hook::call('my_hook', 'Hello world');  // echo 'Hello world'

Removing a Single Callback from a Hook:

Hook internally creates unique ids for callbacks, so they can be removed

$callback = function($message){
  echo $message;
};
Hook::add('my_hook', $callback);
Hook::call('my_hook', 'Hello world');  // echo 'Hello world'
Hook::remove('my_hook', $callback);
Hook::call('my_hook', 'Hello world'); // does nothing

Removing all Callbacks for a Hook:

Hook::add('my_hook', function($message){
  echo $message;
});
Hook::remove('my_hook');
Hook::call('my_hook', 'Hello world'); // does nothing

Priority and Return False

Hook::add('my_hook', function($message){
  echo $message;
}, 100); // priority of 100
Hook::add('my_hook', function(){
  return false;
}, 99);
Hook::call('my_hook', 'Hello world'); // does nothing, because the callback that returned false was executed first

Get Array of Registered Callbacks for a Hook

Hook::add('my_hook', function($message){
  echo $message;
}, 100); // priority of 100
Hook::add('my_hook', function(){
  return false;
}, 99);
Hook::get('my_hook'); // returns numeric array with both callbacks, in the order that they would execute