3v4l.org

run code in 300+ PHP versions simultaneously
<?php function printer() { echo "I'm printer!".PHP_EOL; while (true) { $string = yield; echo $string.PHP_EOL; } } $printer = printer(); $printer->send('Hello world!'); $printer->send('Bye world!');
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
I'm printer! Hello world! Bye world!

preferences:
276.77 ms | 403 KiB | 294 Q