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<!DOCTYPE html> <html> <body> <?php // Create an Iterator class MyIterator implements Iterator { private $items = []; private $pointer = 0; public function __construct($items) { // array_values() makes sure that the keys are numbers $this->items = array_values($items); } public function current() { return $this->items[$this->pointer]; } public function key() { return $this->pointer; } public function next() { $this->pointer++; } public function rewind() { $this->pointer = 0; } public function valid() { // count() indicates how many items are in the list return $this->pointer < count($this->items); } } // A function that uses iterables function printIterable(iterable $myIterable) { foreach($myIterable as $item) { echo $item; } } // Use the iterator as an iterable $iterator = new MyIterator(["a", "b", "c"]); printIterable($iterator); ?> </body> </html>
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