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run code in 200+ php & hhvm versions
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<?php function gen() { if (false || yield) { yield 'true'; return; } yield 'false'; return; } var_dump(gen()->send(true));
Output for 5.6.0 - 5.6.30, 7.0.0 - 7.2.6
string(4) "true"
Output for hhvm-3.12.14 - 3.17.3
Fatal error: Uncaught Error: syntax error, unexpected T_YIELD in /in/8tkt2:4 Stack trace: #0 {main}
Process exited with code 255.