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<?php
namespace RocketTheme\Toolbox\ArrayTraits;
/**
* Implements \Iterator interface.
*
* @package RocketTheme\Toolbox\ArrayTraits
* @author RocketTheme
* @license MIT
*/
trait Iterator
{
/** @var bool Hack to make Iterator work together with unset(). */
private $iteratorUnset = false;
/**
* Returns the current element.
*
* @return mixed Can return any type.
*/
#[\ReturnTypeWillChange]
public function current()
{
return current($this->items);
}
/**
* Returns the key of the current element.
*
* @return string|null Returns key on success, or NULL on failure.
*/
#[\ReturnTypeWillChange]
public function key()
{
return (string)key($this->items);
}
/**
* Moves the current position to the next element.
*
* @return void
*/
#[\ReturnTypeWillChange]
public function next()
{
if ($this->iteratorUnset) {
// If current item was unset, position is already in the next element (do nothing).
$this->iteratorUnset = false;
} else {
next($this->items);
}
}
/**
* Rewinds back to the first element of the Iterator.
*
* @return void
*/
#[\ReturnTypeWillChange]
public function rewind()
{
$this->iteratorUnset = false;
reset($this->items);
}
/**
* This method is called after Iterator::rewind() and Iterator::next() to check if the current position is valid.
*
* @return bool Returns TRUE on success or FALSE on failure.
*/
#[\ReturnTypeWillChange]
public function valid()
{
return key($this->items) !== null;
}
}