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run code in 150+ php & hhvm versions
Bugs & Features
<?php $result = []; function getNumsOdd(array $nums, array &$result) { foreach($nums as $num) { iterator_apply(get2Nums($num, $result),function(){yield;}); //foreach(get2Nums($num, $result) as $x){yield;}; } } function get2Nums(array $nums, array &$result) { foreach($nums as $num) { if ($num % 2) { $result[] = $num; yield; } } } foreach(getNumsOdd([[1,3,4,5,6],[7,8,9,10]], $result) as $x); print_r($result);
Output for 5.5.24 - 5.6.28, 7.0.0 - 7.1.0
Warning: Invalid argument supplied for foreach() in /in/M8Z7k on line 20 Array ( [0] => 1 [1] => 3 [2] => 5 [3] => 7 [4] => 9 )
Output for hhvm-3.12.0
Warning: Invalid argument supplied for foreach() in /in/M8Z7k on line 20 Array ( [0] => 1 [1] => 7 )
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.4.0 - 5.4.45
Notice: Use of undefined constant yield - assumed 'yield' in /in/M8Z7k on line 15 Notice: Use of undefined constant yield - assumed 'yield' in /in/M8Z7k on line 15 Notice: Use of undefined constant yield - assumed 'yield' in /in/M8Z7k on line 15 Catchable fatal error: Argument 1 passed to iterator_apply() must implement interface Traversable, null given, called in /in/M8Z7k on line 20 and defined in /in/M8Z7k on line 6
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/M8Z7k on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/M8Z7k on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/M8Z7k on line 2
Process exited with code 255.