Online PHP editor | refs for leTP7

<?php // Everything you enter here will be executed by our servers. Try it! function iterator_compose() { foreach (array_reverse(func_get_args()) as $it) { $prev = null; if (is_callable($it)) { $prev = $it($prev); } else if (is_object($it)) { $prev = $it; } else { $prev = new $it($prev); } } return $prev; } function cycle($it) { $saved = []; foreach ($it as $key => $val) { $saved[] = $val; yield $val; } while ($saved) { foreach ($saved as $val) { yield $val; } } } function limit($it, $count, $offset = 0) { return new LimitIterator($it, $offset, $count); } function iterator_chunk(\Traversable $it, $chunkSize) { $it->rewind(); $chunk = []; $steps = range(0, $chunkSize); while (true) { foreach ($steps as $_) { if (!$it->valid()) { break 2; } $chunk[] = $it->current(); $it->next(); } yield $chunk; $chunk = []; } if ($chunk) { yield $chunk; } } $it = iterator_chunk( new ArrayIterator(range(0, 125)) , 32); $colors = new ArrayIterator(['red', 'green', 'blue']); foreach (limit(cycle($colors), 10) as $color) { echo "$color\n"; } foreach ($it as $i => $c) { echo "====== Chunk $i ======\n"; var_export($c); echo "\n"; }