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<?php class TestIterator implements Iterator { protected $array; protected $position = 0;
public function __construct($array = []) { $this->array = $array; }
public function rewind() { $this->position = 0; }
public function valid() { return $this->position < count($this->array); }
public function key() { return $this->position; }
public function current() { return $this->array[$this->position]; }
public function next() { $this->position++; } }
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