3v4l.org

run code in 300+ PHP versions simultaneously
<?php interface Foo extends \Traversable { } interface Baz { } class Example implements Foo, \IteratorAggregate, Baz { public function getIterator() { return new \ArrayIterator([]); } }
Output for 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
Deprecated: Return type of Example::getIterator() should either be compatible with IteratorAggregate::getIterator(): Traversable, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/9VqNt on line 13
Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30
Output for 5.6.0 - 5.6.29, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33
Fatal error: Class Example must implement interface Traversable as part of either Iterator or IteratorAggregate in Unknown on line 0
Process exited with code 255.
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