php手册学习的 迭代器 Iterator

pos = 0;
	}

	#定义指针置0 rewind
	public function rewind(){
		echo __METHOD__,"
";
		$this->pos=0;
	}

	#定义valid 方法
	public function valid(){
		#判断是否可行
		echo __METHOD__,"
";
		if(isset($this->arr[$this->pos])){
			return isset($this->arr[$this->pos]);
		}
	}

	#获取当前的值 current
	public function current(){
		echo __METHOD__,"
";
		return $this->arr[$this->pos];
	}

	#获取当前的键值 key
	public function key(){
		echo __METHOD__,"
";
		return $this->pos;
	}

	#指针下移函数
	public function next(){
		echo __METHOD__,"
";
		++$this->pos;
	}

}

#实例化对象
$test = new MyIterator();

#遍历对象
foreach($test as $key=>$val){
	var_dump($key,$val);
	echo '
';
}

以上就介绍了php手册学习的 迭代器 Iterator，包括了方面的内容，希望对PHP教程有兴趣的朋友有所帮助。