Online PHP editor | refs for fj7q8

<?php define("TEST_STRING", "Hello World!"); class RequestObserver { public function __construct() { ob_start(); } public function __destruct() { $content = ob_get_flush(); if ($content == TEST_STRING) { echo PHP_EOL, "+ Test passed"; } else { echo PHP_EOL, "- Test failed:", PHP_EOL; var_dump($content); } } } $observer = new RequestObserver(); echo TEST_STRING;