94 lines
1.8 KiB
PHP
94 lines
1.8 KiB
PHP
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<?php
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/**
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* CStackIterator class file.
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*
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* @author Qiang Xue <qiang.xue@gmail.com>
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* @link http://www.yiiframework.com/
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* @copyright 2008-2013 Yii Software LLC
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* @license http://www.yiiframework.com/license/
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*/
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/**
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* CStackIterator implements an iterator for {@link CStack}.
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*
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* It allows CStack to return a new iterator for traversing the items in the stack.
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*
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* @author Qiang Xue <qiang.xue@gmail.com>
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* @package system.collections
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* @since 1.0
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*/
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class CStackIterator implements Iterator
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{
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/**
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* @var array the data to be iterated through
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*/
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private $_d;
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/**
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* @var integer index of the current item
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*/
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private $_i;
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/**
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* @var integer count of the data items
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*/
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private $_c;
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/**
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* Constructor.
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* @param array $data the data to be iterated through
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*/
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public function __construct(&$data)
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{
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$this->_d=&$data;
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$this->_i=0;
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$this->_c=count($this->_d);
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}
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/**
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* Rewinds internal array pointer.
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* This method is required by the interface Iterator.
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*/
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public function rewind()
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{
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$this->_i=0;
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}
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/**
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* Returns the key of the current array item.
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* This method is required by the interface Iterator.
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* @return integer the key of the current array item
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*/
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public function key()
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{
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return $this->_i;
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}
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/**
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* Returns the current array item.
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* This method is required by the interface Iterator.
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* @return mixed the current array item
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*/
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public function current()
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{
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return $this->_d[$this->_i];
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}
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/**
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* Moves the internal pointer to the next array item.
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* This method is required by the interface Iterator.
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*/
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public function next()
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{
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$this->_i++;
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}
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/**
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* Returns whether there is an item at current position.
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* This method is required by the interface Iterator.
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* @return boolean
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*/
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public function valid()
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{
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return $this->_i<$this->_c;
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}
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}
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