IteratorIterator::key()
(PHP 5>=5.1.0,PHP 7)
Get the key of the current element
说明
public IteratorIterator::key(void) : mixed
Get the key of the current element.
参数
此函数没有参数。
返回值
The key of the current element.
参见
- IteratorIterator::current() Get the current value