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<?php class MyIterator implements Iterator { private $var = array(); public function __construct($array) { if (is_array($array)) { $this->var = $array; } } public function rewind() { echo "перемотка в начало\n"; reset($this->var); } public function current() { $var = current($this->var); echo "текущий: $var\n"; return $var; } public function key() { $var = key($this->var); echo "ключ: $var\n"; return $var; } public function next() { $var = next($this->var); echo "следующий: $var\n"; return $var; } public function valid() { $key = key($this->var); $var = ($key !== NULL && $key !== FALSE); echo "верный: $var\n"; return $var; } } $values = array(1,2,3); $it = new MyIterator($values); array_map(function($v) { var_dump($v); }, $it);