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<?php class ColumnFieldsIterator implements \IteratorAggregate { public function getIterator() { return new ArrayIterator(['columns2','columns']); } } class RowFieldsIterator implements \IteratorAggregate { public function getIterator() { return new ArrayIterator(['rows2','rows']); } } class AllIterator implements \IteratorAggregate { public function getIterator() { $iterator = new AppendIterator; $iterator->append(new ColumnFieldsIterator); $iterator->append(new RowFieldsIterator); return $iterator ; } } $all = new AllIterator; foreach ($all as $k => $v) { echo "$k => $v\n"; }
Output for git.master, git.master_jit, rfc.property-hooks
Deprecated: Return type of ColumnFieldsIterator::getIterator() should either be compatible with IteratorAggregate::getIterator(): Traversable, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/vBAVq on line 5 Deprecated: Return type of RowFieldsIterator::getIterator() should either be compatible with IteratorAggregate::getIterator(): Traversable, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/vBAVq on line 13 Deprecated: Return type of AllIterator::getIterator() should either be compatible with IteratorAggregate::getIterator(): Traversable, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/vBAVq on line 21 Fatal error: Uncaught TypeError: AppendIterator::append(): Argument #1 ($iterator) must be of type Iterator, ColumnFieldsIterator given in /in/vBAVq:24 Stack trace: #0 /in/vBAVq(24): AppendIterator->append(Object(ColumnFieldsIterator)) #1 /in/vBAVq(32): AllIterator->getIterator() #2 {main} thrown in /in/vBAVq on line 24
Process exited with code 255.

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