3v4l.org

run code in 300+ PHP versions simultaneously
<?php function a() { var_dump(yield); } foreach(a() as $k => $v) { var_dump($k, $v); }
Output for 5.5.0 - 5.5.38, 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
int(0) NULL NULL
Output for 4.3.0 - 4.3.10, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45
Notice: Use of undefined constant yield - assumed 'yield' in /in/mQJX3 on line 5 string(5) "yield" Warning: Invalid argument supplied for foreach() in /in/mQJX3 on line 8
Output for 4.3.11
Notice: Use of undefined constant yield - assumed 'yield' in /in/mQJX3 on line 5 string(5) "yield"
preferences:
228.35 ms | 401 KiB | 459 Q