3v4l.org

run code in 300+ PHP versions simultaneously
<?php function generator() { yield // this comment doesn't make sense, but hey, why not? /* the blank line above doesn't make sense either, as well as this comment */ /* and thinking about it – */ // why not go batshit crazy with this? /* he */ from gen2(); }
Output for 8.3.0 - 8.3.14
Output for 8.1.0 - 8.1.30, 8.2.0 - 8.2.25
Parse error: syntax error, unexpected identifier "gen2" in /in/4CLhM on line 11
Process exited with code 255.
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