Online PHP editor | refs for jDDOr

<?php $i = 0; $start = microtime(true); for ($i=0; $i < 1000000; ++$i) { if (false) {} } $end = microtime(true); echo 'if(false): ' . sprintf('%f', $end - $start) . PHP_EOL; $start = microtime(true); for ($i=0; $i < 1000000; ++$i) { if (null) {} } $end = microtime(true); echo 'if(null): ' . sprintf('%f', $end - $start) . PHP_EOL;