Online PHP editor | output for JJWSX

<?php class ClassName1 { function __destruct() { print "Destroying " . __CLASS__ . "\n"; } } $fiber = new Fiber( function() { $d1 = new ClassName1; // Resulted output //$d2 = \WeakReference::create(\Fiber::getCurrent())->get(); // expected output \WeakReference::create(\Fiber::getCurrent())->get(); Fiber::suspend(); return ; } ); echo "1\n"; $fiber->start(); echo "2\n"; $fiber = null; echo "3\n";