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<?php class test implements IteratorAggregate { public function getIterator() { return false; } } foreach(new test() as $t) { echo $t, PHP_EOL; }
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Deprecated: Return type of test::getIterator() should either be compatible with IteratorAggregate::getIterator(): Traversable, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/0BpP1 on line 4 Fatal error: Uncaught Exception: Objects returned by test::getIterator() must be traversable or implement interface Iterator in /in/0BpP1:9 Stack trace: #0 {main} thrown in /in/0BpP1 on line 9
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, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30
Fatal error: Uncaught Exception: Objects returned by test::getIterator() must be traversable or implement interface Iterator in /in/0BpP1:9 Stack trace: #0 {main} thrown in /in/0BpP1 on line 9
Process exited with code 255.
Output for 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 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 'Exception' with message 'Objects returned by test::getIterator() must be traversable or implement interface Iterator' in /in/0BpP1:9 Stack trace: #0 /in/0BpP1(9): unknown() #1 {main} thrown in /in/0BpP1 on line 9
Process exited with code 255.
Output for 5.0.4

Process exited with code 139.
Output for 5.0.0 - 5.0.3
Warning: Objects returned by test::getIterator() must be traversable or implement interface Iterator in /in/0BpP1 on line 9
Process exited with code 139.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting '{' in /in/0BpP1 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/0BpP1 on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `'{'' in /in/0BpP1 on line 3
Process exited with code 255.

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