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<?php
namespace itertools;
use InvalidArgumentException;
use FilterIterator;
/** For PHP 5.3 */
class CallbackFilterIterator extends FilterIterator
{
protected $callback;
public function __construct($iterator, $callback)
parent::__construct(IterUtil::asIterator($iterator));
if (! is_callable($callback)) {
throw new InvalidArgumentException('No valid callback provided');
}
$this->callback = $callback;
public function accept()
return call_user_func($this->callback, $this->current(), $this->key(), $this->getInnerIterator());
SuRaMoN /
itertools
