Online PHP editor | refs for hDRK5

<?php function uppercase(Traversable $in) { foreach ($in as $word) { yield strtoupper($word); } } function reverse(Traversable $in) { foreach ($in as $word) { yield strrev($word); } } function each_println(Traversable $in) { foreach ($in as $line) { echo "$line\n"; } } function allAbove(Traversable $in) { foreach($in as $word) { yield array('upper' => strtoupper($word), 'rev' => strrev($word), 'combined' => strrev(strtoupper($word))); } } each_println(reverse(uppercase(new ArrayIterator(["foo", "bar", "baz"])))); foreach(allAbove(new ArrayIterator(["foo", "bar", "baz"])) as $item) { each_println(new ArrayIterator($item)); }