Online PHP editor | output for hOKu9

<?php /** * @return Generator */ function test() { echo "Preparing generator.", PHP_EOL; $start = microtime(true); $first = (yield Async::call("file_get_contents", array("http://www.php.net"))); echo "Receiving first result: ", number_format((microtime(true) - $start) * 1e3, 2), 'ms', PHP_EOL; $second = (yield Async::call("file_get_contents", array("http://www.alpari.ru"))); echo "Receiving second result: ", number_format((microtime(true) - $start) * 1e3, 2), 'ms', PHP_EOL; echo "Asynchronous result received: ", strlen((string) $first), ' and ', strlen((string) $second), 'bytes', PHP_EOL; echo "Total: ", number_format((microtime(true) - $start) * 1e3, 2), 'ms', PHP_EOL; }; echo "<pre>"; $future = test();