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<?php new ParentIterator( new RecursiveIteratorIterator( new RecursiveArrayIterator, RecursiveIteratorIterator::CHILD_FIRST ) );
Output for 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught TypeError: ParentIterator::__construct(): Argument #1 ($iterator) must be of type RecursiveIterator, RecursiveIteratorIterator given in /in/R9uak:2 Stack trace: #0 /in/R9uak(2): ParentIterator->__construct(Object(RecursiveIteratorIterator)) #1 {main} thrown in /in/R9uak on line 2
Process exited with code 255.
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28
Fatal error: Uncaught TypeError: ParentIterator::__construct(): Argument #1 ($iterator) must be of type RecursiveIterator, RecursiveIteratorIterator given in /in/R9uak:5 Stack trace: #0 /in/R9uak(5): ParentIterator->__construct(Object(RecursiveIteratorIterator)) #1 {main} thrown in /in/R9uak on line 5
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Fatal error: Uncaught TypeError: Argument 1 passed to ParentIterator::__construct() must implement interface RecursiveIterator, instance of RecursiveIteratorIterator given in /in/R9uak:5 Stack trace: #0 /in/R9uak(5): ParentIterator->__construct(Object(RecursiveIteratorIterator)) #1 {main} thrown in /in/R9uak on line 5
Process exited with code 255.
Output for 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.35, 5.6.0 - 5.6.28
Catchable fatal error: Argument 1 passed to ParentIterator::__construct() must implement interface RecursiveIterator, instance of RecursiveIteratorIterator given in /in/R9uak on line 7
Process exited with code 255.
Output for 5.1.0 - 5.1.6
Fatal error: Argument 1 passed to ParentIterator::__construct() must implement interface RecursiveIterator in /in/R9uak on line 7
Process exited with code 255.
Output for 5.0.1 - 5.0.5
Fatal error: Class 'RecursiveArrayIterator' not found in /in/R9uak on line 4 Fatal error: Unknown: The inner constructor wasn't initialized with an iterator instance in Unknown on line 0
Process exited with code 255.
Output for 5.0.0
Fatal error: Class 'RecursiveArrayIterator' not found in /in/R9uak on line 4
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected ')', expecting '(' in /in/R9uak on line 6
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected ')', expecting '(' in /in/R9uak on line 6
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `'('' in /in/R9uak on line 6
Process exited with code 255.

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