3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php function f() { $a = yield -1; var_dump($a); } $g = f(); foreach ($g as $i) { var_dump($i); }
based on Veb2W
Output for hhvm-3.15.4, 7.0.0 - 7.2.6
int(-1) NULL
Output for 5.6.0 - 5.6.30
NULL int(-1)