3v4l.org

run code in 500+ PHP versions simultaneously
<?php function naturalIntegers() { $i = 0; while (true) { yield $i++; } } foreach(naturalIntegers() as $i) { if ($i > 10) { break; } print $i.PHP_EOL; } print "finished\n";
Output for 8.1.32 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.21, 8.5.0 - 8.5.6
0 1 2 3 4 5 6 7 8 9 10 finished

preferences:
58.5 ms | 852 KiB | 4 Q