easycsv.php

public function doCSV() {  
      
        $list = (new \Dash\Site\Models\Event\Tags)->populateState()->setCondition('attendee.id', array('$exists' => false))->setCondition('ticket.id', array('$exists' => false))->setCondition('sysgentag',1)->getItems(); 

        $fp = fopen('php://output', 'w');
        
        header('Content-Type: application/excel');
        header('Content-Disposition: attachment; filename="emptytags.csv"');

         $fp = fopen('php://output', 'w');
        foreach ($list as $tag) {
           $array[0] = 'http://ryst.cc/b/'.$tag->tagid;
           fputcsv($fp, $array);
        }

        fclose($fp);
        die();
    }