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<?php class TrimIterator extends IteratorIterator { public function current() { return trim(parent::current()); } } $innerIterator = new ArrayIterator(array('normal', ' trimmable ')); $trim = new TrimIterator($innerIterator); foreach ($trim as $key => $value) { echo "Key:\n"; var_dump($key); echo "Value:\n"; var_dump($value); echo "---next---"; }
Output for git.master, git.master_jit, rfc.property-hooks
Deprecated: Return type of TrimIterator::current() should either be compatible with IteratorIterator::current(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/Y2CVd on line 5 Key: int(0) Value: string(6) "normal" ---next---Key: int(1) Value: string(9) "trimmable" ---next---

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