3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Foo implements IteratorAggregate { public function getIterator() { return 0; } } $foo = new Foo(); $i = new RecursiveTreeIterator($foo); foreach ($i as $val) { echo $val; }
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Deprecated: Return type of Foo::getIterator() should either be compatible with IteratorAggregate::getIterator(): Traversable, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/V6pgB on line 5 Fatal error: Uncaught LogicException: Foo::getIterator() must return an object that implements Traversable in /in/V6pgB:12 Stack trace: #0 /in/V6pgB(12): RecursiveTreeIterator->__construct(Object(Foo)) #1 {main} thrown in /in/V6pgB on line 12
Process exited with code 255.
Output for 8.0.10 - 8.0.30
Fatal error: Uncaught LogicException: Foo::getIterator() must return an object that implements Traversable in /in/V6pgB:12 Stack trace: #0 /in/V6pgB(12): RecursiveTreeIterator->__construct(Object(Foo)) #1 {main} thrown in /in/V6pgB on line 12
Process exited with code 255.
Output for 8.0.0 - 8.0.9
Fatal error: Uncaught TypeError: RecursiveCachingIterator::__construct(): Argument #1 ($iterator) must be of type RecursiveIterator, int given in /in/V6pgB:12 Stack trace: #0 [internal function]: RecursiveCachingIterator->__construct(0, 16) #1 /in/V6pgB(12): RecursiveTreeIterator->__construct(Object(Foo)) #2 {main} thrown in /in/V6pgB on line 12
Process exited with code 255.
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Fatal error: Uncaught TypeError: RecursiveCachingIterator::__construct() expects parameter 1 to be RecursiveIterator, int given in /in/V6pgB:12 Stack trace: #0 [internal function]: RecursiveCachingIterator->__construct(0, 16) #1 /in/V6pgB(12): RecursiveTreeIterator->__construct(Object(Foo)) #2 {main} thrown in /in/V6pgB on line 12
Process exited with code 255.
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33
Fatal error: Uncaught TypeError: RecursiveCachingIterator::__construct() expects parameter 1 to be RecursiveIterator, integer given in /in/V6pgB:12 Stack trace: #0 [internal function]: RecursiveCachingIterator->__construct(0, 16) #1 /in/V6pgB(12): RecursiveTreeIterator->__construct(Object(Foo)) #2 {main} thrown in /in/V6pgB on line 12
Process exited with code 255.
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Fatal error: Uncaught exception 'InvalidArgumentException' with message 'RecursiveCachingIterator::__construct() expects parameter 1 to be RecursiveIterator, integer given' in /in/V6pgB:12 Stack trace: #0 [internal function]: RecursiveCachingIterator->__construct(0, 16) #1 /in/V6pgB(12): RecursiveTreeIterator->__construct(Object(Foo)) #2 {main} thrown in /in/V6pgB on line 12
Process exited with code 255.
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Fatal error: Class 'RecursiveTreeIterator' not found in /in/V6pgB on line 12
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting '{' in /in/V6pgB on line 3
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 T_STRING, expecting '{' in /in/V6pgB on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `'{'' in /in/V6pgB on line 3
Process exited with code 255.

preferences:
309.75 ms | 401 KiB | 460 Q