Online PHP editor | refs for Y6kiG

<?php function by_return($dummy=null) { $dummy = str_repeat("1",100 * 1024 * 1024); return $dummy; } function by_reference(&$dummy) { $dummy = null; $dummy = str_repeat("1",100 * 1024 * 1024); } echo memory_get_usage()."/".memory_get_peak_usage()."\n"; //1 always returns: 105493696/105496656 $nagid = by_return(); echo memory_get_usage()."/".memory_get_peak_usage()."\n"; unset($nagid); //2 always returns: 105493696/210354184 even if we comment 1st part by_reference($dummy); echo memory_get_usage()."/".memory_get_peak_usage()."\n"; unset($dummy);