php - How to implement observation if we already used intheritance? -

there forumthread class:

class forumthread extends dbtable {     public function insert ($threadid, $comment)     {         sql insert parent::tablename values $threadid, $comment         // email sending how?         // putting on "notice-wall", how?     } } 

some other functions should done here, e.g. email sending. cant put here otherwise violate srp. cant put neither controller, want insert post elsewhere too. im planning implement observed pattern, cant extend 2 classes.

with observer pattern have dispatch notification method in order execute relevant observers code.

you execute within insert method:

$this->notify('table_insertion', $data); 

then somewhere else before notify line executed, event must registered so:

static::$observers['table_insertion'][] = array('class_to_call' => 'method_in_class_to_call'); 

the notify method like:

public function notify($event, $data) {   foreach(static::$observer[$event] $class => $method) {     new $class->$method($data);   } } 

hope makes sense.