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run code in 150+ php & hhvm versions
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<?php $obj = (object)array( 1 => 'value of 1', 'x' => 'value of x', ); var_dump($obj, get_object_vars($obj)); var_dump(iterator_to_array($obj, true));
Output for 7.0.0 - 7.1.0
object(stdClass)#1 (2) { [1]=> string(10) "value of 1" ["x"]=> string(10) "value of x" } array(2) { [1]=> string(10) "value of 1" ["x"]=> string(10) "value of x" } Fatal error: Uncaught TypeError: Argument 1 passed to iterator_to_array() must implement interface Traversable, instance of stdClass given in /in/sGK7I:8 Stack trace: #0 /in/sGK7I(8): iterator_to_array(Object(stdClass), true) #1 {main} thrown in /in/sGK7I on line 8
Process exited with code 255.
Output for hhvm-3.12.0
object(stdClass)#1 (2) { [1]=> string(10) "value of 1" ["x"]=> string(10) "value of x" } array(2) { [1]=> string(10) "value of 1" ["x"]=> string(10) "value of x" } Catchable fatal error: Argument must implement interface Traversable in /in/sGK7I on line 8
Process exited with code 255.
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.2.0 - 5.6.28
object(stdClass)#1 (2) { [1]=> string(10) "value of 1" ["x"]=> string(10) "value of x" } array(1) { ["x"]=> string(10) "value of x" } Catchable fatal error: Argument 1 passed to iterator_to_array() must implement interface Traversable, instance of stdClass given in /in/sGK7I on line 8
Process exited with code 255.
Output for 5.1.0 - 5.1.6
object(stdClass)#1 (2) { [1]=> string(10) "value of 1" ["x"]=> string(10) "value of x" } array(1) { ["x"]=> string(10) "value of x" } Warning: iterator_to_array() expects exactly 1 parameter, 2 given in /in/sGK7I on line 8 bool(false)
Output for 5.0.0 - 5.0.5
object(stdClass)#1 (2) { [1]=> string(10) "value of 1" ["x"]=> string(10) "value of x" } array(1) { ["x"]=> string(10) "value of x" } Fatal error: Call to undefined function iterator_to_array() in /in/sGK7I on line 8
Process exited with code 255.
Output for 4.4.5 - 4.4.9
object(stdClass)(2) { [1]=> string(10) "value of 1" ["x"]=> string(10) "value of x" } array(2) { [1]=> string(10) "value of 1" ["x"]=> string(10) "value of x" } Fatal error: Call to undefined function: iterator_to_array() in /in/sGK7I on line 8
Process exited with code 255.
Output for 4.3.2 - 4.4.4
object(stdClass)(2) { [1]=> string(10) "value of 1" ["x"]=> string(10) "value of x" } array(2) { [1]=> string(10) "value of 1" ["x"]=> string(10) "value of x" } Fatal error: Call to undefined function: iterator_to_array() in /in/sGK7I on line 8
Process exited with code 255.
Output for 4.3.0 - 4.3.1
object(stdClass)(2) { [1]=> string(10) "value of 1" ["x"]=> string(10) "value of x" } array(2) { [1]=> string(10) "value of 1" ["x"]=> string(10) "value of x" } Fatal error: Call to undefined function: iterator_to_array() in /in/sGK7I on line 8