Description:
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From manual page: https://php.net/language.oop5.iterations
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The example for an object implementing Iterator on this page has every method, including next() returning a value, but the return types on these methods don't allow this.

While this "works", it will cause static analysis to hilight these as errors.

Additionally, the example here feels duplicitous - would it not be better to simply link to https://www.php.net/manual/en/class.iterator.php which already has a very similar (and more correctly implemented) example?