Online PHP editor | refs for tasWf

<?php namespace GeneratorExample; 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"; } } $words = new \ArrayIterator(["foo", "bar", "baz"]); each_println(reverse(uppercase($words)));