ArrayIterator::valid

(PHP 5, PHP 7, PHP 8)

ArrayIterator::valid — Check whether array contains more entries

说明

public ArrayIterator::valid(): bool

Checks if the array contains any more entries.

参数

此函数没有参数。

返回值

Returns true if the iterator is valid, otherwise false

示例

示例 #1 ArrayIterator::valid() example

<?php
$array = array('1' => 'one');

$arrayobject = new ArrayObject($array);
$iterator = $arrayobject->getIterator();

var_dump($iterator->valid()); //bool(true)

$iterator->next(); // advance to the next item

//bool(false) because there is only one array element
var_dump($iterator->valid());
?>