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run code in 150+ php & hhvm versions
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<?php $result = []; function getNumsOdd(array $nums, array &$result) { foreach($nums as $key => $num) { if ($num % 2) { $result[$key] = $num; yield $num; } } } foreach(getNumsOdd([1,3,4,5,6]) as $x); var_dump($result);
Output for 7.1.0
Fatal error: Uncaught ArgumentCountError: Too few arguments to function getNumsOdd(), 1 passed in /in/hL3Yj on line 13 and exactly 2 expected in /in/hL3Yj:3 Stack trace: #0 /in/hL3Yj(13): getNumsOdd(Array) #1 {main} thrown in /in/hL3Yj on line 3
Process exited with code 255.
Output for 7.0.0 - 7.0.14
Fatal error: Uncaught TypeError: Argument 2 passed to getNumsOdd() must be of the type array, none given, called in /in/hL3Yj on line 13 and defined in /in/hL3Yj:3 Stack trace: #0 /in/hL3Yj(13): getNumsOdd(Array) #1 {main} thrown in /in/hL3Yj on line 3
Process exited with code 255.
Output for hhvm-3.12.0
Warning: getNumsOdd() expects exactly 2 parameters, 1 given in /in/hL3Yj on line 11 Catchable fatal error: Argument 2 passed to getNumsOdd() must be an instance of array, undefined variable given in /in/hL3Yj on line 11
Process exited with code 255.
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.5.24 - 5.6.28
Catchable fatal error: Argument 2 passed to getNumsOdd() must be of the type array, none given in /in/hL3Yj on line 3
Process exited with code 255.
Output for 5.4.0 - 5.4.45
Parse error: syntax error, unexpected '$num' (T_VARIABLE) in /in/hL3Yj on line 8
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/hL3Yj 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/hL3Yj on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/hL3Yj on line 2
Process exited with code 255.