3v4l.org

run code in 300+ PHP versions simultaneously
<?php function printer() { echo "I'm printer!".PHP_EOL; while (true) { $string = yield 'yielded'; echo $string.PHP_EOL; } } $printer = printer(); $printer->rewind(); var_dump($printer->current()); //$printer->send('Hello world!'); //$printer->send('Bye world!'); ?>
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.29, 8.2.0 - 8.2.23, 8.3.0 - 8.3.11
I'm printer! string(7) "yielded"
preferences:
93.69 ms | 408 KiB | 5 Q