3v4l.org

run code in 300+ PHP versions simultaneously
<?php function generator() { for($i = 0 ; $i <= 20 ; $i++) { yield $i; } } $generator = generator(); $callback = function($value) { return !($value % 2); }; foreach(new CallbackFilterIterator($generator , $callback) as $value) { echo $value."\n"; }
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 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
0 2 4 6 8 10 12 14 16 18 20
preferences:
59.96 ms | 408 KiB | 5 Q