ArrayIterator::offsetExists
(PHP 5, PHP 7)
ArrayIterator::offsetExists — Check if offset exists
说明
public ArrayIterator::offsetExists
( mixed $index
) : bool
Checks if the offset exists.
Warning 本函数还未编写文档，仅有参数列表。
参数
index- The offset being checked.
返回值
true if the offset exists, otherwise false
