3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php function gen1() { yield 1; yield 2; yield 3; return 42; } function yieldFrom($iter) { return yield from $iter; } $g = function($iter) { $isSubgenerator = $iter instanceof Generator; $received = null; $send = true; while ($iter->valid()) { if ($isSubgenerator) { $next = $send ? $iter->send($received) : $iter->throw($received); } else { $next = $iter->current(); $iter->next(); } try { $received = yield $next; $send = true; } catch (Exception $e) { if ($isSubgenerator) { $received = $e; $send = false; } else { throw $e; } } } return $isSubgenerator ? $iter->getReturn() : null; }; $gen = $g(gen1()); foreach($gen as $val) { var_dump($val); } var_dump($gen->getReturn()); echo "=============\n"; $gen = yieldFrom(gen1()); foreach($gen as $val) { var_dump($val); } var_dump($gen->getReturn());
based on Xr5Rr
Output for 7.0.0 - 7.2.0
int(2) int(3) NULL int(42) ============= int(1) int(2) int(3) int(42)
Output for 5.5.24 - 5.6.28
Fatal error: Generators cannot return values using "return" in /in/ltILH on line 7
Process exited with code 255.
Output for 5.4.0 - 5.4.45
Parse error: syntax error, unexpected '1' (T_LNUMBER) in /in/ltILH on line 4
Process exited with code 255.
Output for 5.3.19 - 5.3.29
Parse error: syntax error, unexpected T_LNUMBER in /in/ltILH on line 4
Process exited with code 255.