Online PHP editor | refs for NkcOk

<?php $array = array_fill(0, 10000, 1); function by_reference(&$array) { echo "Inner by_reference: ", memory_get_usage(true), "\n"; foreach ($array as $var) { echo "Inner foreach: ", memory_get_usage(true), "\n"; break; } } function by_value($array) { echo "Inner by_value: ", memory_get_usage(true), "\n"; foreach ($array as $var) { echo "Inner foreach: ", memory_get_usage(true), "\n"; break; } } echo "Start: ", memory_get_usage(true), "\n"; by_reference($array); echo "After by_reference: ", memory_get_usage(true), "\n"; by_value($array); echo "After by_value: ", memory_get_usage(true), "\n";