Observer sample for Oauth2

SyslogObserverImpl.php AND Factory for ZF2 Oauth2ServerInstanceFactory.php

<?php
namespace ZF\OAuth2\Observer;

use SplObserver;
use SplSubject;

class SyslogObserverImpl implements SplObserver
{

    public function update(SplSubject $subject)
    {
        try {
            $event = $subject->getMostRecentObservableEvent();
            
            $req = json_encode($event->getDetails()['request']);
            $reqArr = json_decode($req, true);
            if (array_key_exists('request', $reqArr) && array_key_exists('password', $reqArr['request']))
                $reqArr['request']['password'] = 'OBFUSCATED';
            
            $req = json_encode($reqArr);
            
            // $details = preg_replace('/\"password\":\".*\"/ig', '"password":"OBFUSCATED"', $details);
            
            syslog(LOG_INFO, 'OAuth2 Observer: Type:' . $event->getType() . ', Message: ' . $event->getMessage() . ', Request Details: ' . $req);
        } catch (\Exception $e) {
            syslog(LOG_ERR, 'Oauth2SyslogObserver - ' . $e->getMessage() . ' - ' . $e->getTraceAsString());
        }
    }
}
?>


...


Inside of Oauth2ServerInstanceFactory

            
            $observer = new SyslogObserverImpl();
            
            $server->attach($observer);