3v4l.org

run code in 300+ PHP versions simultaneously
<?php function gen() { yield 1; yield 2; yield from gen2(); } function gen2() { yield 3; yield 4; } foreach (gen() as $val) { echo $val, PHP_EOL; } ?>
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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
1 2 3 4
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Parse error: syntax error, unexpected 'gen2' (T_STRING) in /in/2B6FW on line 6
Process exited with code 255.
preferences:
150.61 ms | 402 KiB | 183 Q