Online PHP editor | refs for E81rH

<?php echo "++i "; $start = microtime(true); for ($i = 0; $i < 1000000; ++$i); $delta_pre = microtime(true) - $start; printf("%.4F\n", $delta_pre); echo "i++ "; $start = microtime(true); for ($i = 0; $i < 1000000; $i++); $delpa_post = microtime(true) - $start; printf("%.4F\n", $delpa_post); printf("\n%.2F", $delta_pre / $delpa_post * 100); echo "%\n";