Iterator::valid
(PHP 5, PHP 7, PHP 8)
Iterator::valid — 检查当前位置是否有效
参数
此函数没有参数。
返回值
返回将被转换为bool 。成功时返回 true， 或者在失败时返回 false。
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User Contributed Notes 2 notes
seva dot lapsha at gmail dot com ¶
12 years ago
If Iterator::valid() returns false, the foreach() loop will be terminated.
Voitcus at gmail dot com ¶
9 years ago
If your class implements also ArrayAccess interface, you could use as valid() body
function valid(){
return $this->offsetExists($this->position);
}