<?php
 
class Util {
 
    private $logger;
 
    public function __construct(){} 
 
    public function getLogger() {    
        return $this->logger;
    }
 
    public function setLogger($logger) { 
 
        $this->logger = $logger;
    }
}
 
$util = new Util();
 
  $util->setLogger(new class {
    public function log($msg) {
      echo $msg;
    }
  });
 
  $util->getLogger()->log('Phil runs very fast'); // Ioutput should be : Phil runs very fast
 

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