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<?php class BeforeAfterIterator implements Iterator { private $iterator; public function __construct(iterable $iterator, $before, $after) { if (!$iterator instanceof Iterator) { $iterator = (function ($iterable) { yield from $iterable; })($iterator); } if ($iterator->valid()) { $this->iterator = new AppendIterator(); $this->iterator->append(new ArrayIterator([$before])); $this->iterator->append($iterator); $this->iterator->append(new ArrayIterator([$after])); } else { $this->iterator = new ArrayIterator([]); } } public function current() { return $this->iterator->current(); } public function next() { $this->iterator->next(); } public function key() { return $this->iterator->key(); } public function valid() { return $this->iterator->valid(); } public function rewind() { $this->iterator->rewind(); } } $begin = new DateTime('2020-02-01'); $end = new DateTime('2020-02-29'); $interval = new DateInterval('P1D'); $daterange = new DatePeriod($begin, $interval ,$end); foreach (new BeforeAfterIterator($daterange, new \DateTime('2020-01-31'), new \DateTime('2020-03-01')) as $value) { echo $value->format('Y-m-d'), PHP_EOL; } foreach (new BeforeAfterIterator(range(1, 10), 'Before', 'After') as $value) { echo $value, PHP_EOL; } function generator() { yield from [1, 2, 3, 4, 5]; } foreach (new BeforeAfterIterator(generator(), 'Before', 'After') as $value) { echo $value, PHP_EOL; }
Output for git.master, git.master_jit, rfc.property-hooks
Deprecated: Return type of BeforeAfterIterator::current() should either be compatible with Iterator::current(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/0Xa1a on line 24 Deprecated: Return type of BeforeAfterIterator::next() should either be compatible with Iterator::next(): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/0Xa1a on line 29 Deprecated: Return type of BeforeAfterIterator::key() should either be compatible with Iterator::key(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/0Xa1a on line 34 Deprecated: Return type of BeforeAfterIterator::valid() should either be compatible with Iterator::valid(): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/0Xa1a on line 39 Deprecated: Return type of BeforeAfterIterator::rewind() should either be compatible with Iterator::rewind(): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/0Xa1a on line 44 2020-01-31 2020-02-01 2020-02-02 2020-02-03 2020-02-04 2020-02-05 2020-02-06 2020-02-07 2020-02-08 2020-02-09 2020-02-10 2020-02-11 2020-02-12 2020-02-13 2020-02-14 2020-02-15 2020-02-16 2020-02-17 2020-02-18 2020-02-19 2020-02-20 2020-02-21 2020-02-22 2020-02-23 2020-02-24 2020-02-25 2020-02-26 2020-02-27 2020-02-28 2020-03-01 Before 1 2 3 4 5 6 7 8 9 10 After Before 1 2 3 4 5 After

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