original_string: public function filter(EventInterface $event)
      {
          if (!$event instanceof UserEventInterface) {
              return null;
          }
  
          $nick = $event->getNick();
          if ($nick === null) {
              return null;
          }
  
          $userMask = sprintf('%s!%s@%s',
              $nick,
              $event->getUsername(),
              $event->getHost()
          );
  
          foreach ($this->masks as $mask) {
              $pattern = '/^' . str_replace('\*', '.*', preg_quote($mask, '/')) . '$/';
  
              if ($this->caseless) {
                  $pattern .= "i";
              }
  
              if (preg_match($pattern, $userMask)) {
                  return true;
              }
          }
  
          return false;
      }
code: public function filter(EventInterface $event)
      {
          if (!$event instanceof UserEventInterface) {
              return null;
          }
  
          $nick = $event->getNick();
          if ($nick === null) {
              return null;
          }
  
          $userMask = sprintf('%s!%s@%s',
              $nick,
              $event->getUsername(),
              $event->getHost()
          );
  
          foreach ($this->masks as $mask) {
              $pattern = '/^' . str_replace('\*', '.*', preg_quote($mask, '/')) . '$/';
  
              if ($this->caseless) {
                  $pattern .= "i";
              }
  
              if (preg_match($pattern, $userMask)) {
                  return true;
              }
          }
  
          return false;
      }
code_tokens: public function filter ( EventInterface $ event ) { if ( ! $ event instanceof UserEventInterface ) { return null ; } $ nick = $ event -> getNick ( ) ; if ( $ nick === null ) { return null ; } $ userMask = sprintf ( '%s!%s@%s' , $ nick , $ event -> getUsername ( ) , $ event -> getHost ( ) ) ; foreach ( $ this -> masks as $ mask ) { $ pattern = '/^' . str_replace ( '\*' , '.*' , preg_quote ( $ mask , '/' ) ) . '$/' ; if ( $ this -> caseless ) { $ pattern .= "i" ; } if ( preg_match ( $ pattern , $ userMask ) ) { return true ; } } return false ; }
docstring: Filters events that are not user-specific or are from the specified users.
  
  @param \Phergie\Irc\Event\EventInterface $event
  @return boolean|null TRUE if the event originated from a user with a matching mask
  associated with this filter, FALSE if it originated from a user without a
  matching mask, or NULL if it did not originate from a user.
docstring_tokens: Filters events that are not user - specific or are from the specified users .