Online PHP editor | refs for 9D9F9

<?php $doc = new DOMDocument; $docEl = $doc->appendChild($doc->createElement('foo')); echo memory_get_usage() . "\n"; $docEl->appendChild($doc->createElement('foo')); echo memory_get_usage() . "\n"; $docEl->appendChild($doc->createElement('foo')); echo memory_get_usage() . "\n"; $docEl->appendChild($doc->createElement('foo')); echo memory_get_usage() . "\n"; $docEl->appendChild($doc->createElement('foo')); echo memory_get_usage() . "\n"; $docEl->appendChild($doc->createElement('foo')); echo memory_get_usage() . "\n";