ArrayIterator::valid()

(PHP 5,PHP 7)

Check whether array contains more entries

说明

publicArrayIterator::valid(void) : bool

Checks if thearraycontains any more entries.

参数

此函数没有参数。

返回值

ReturnsTRUEif the iterator is valid,otherwiseFALSE

范例

Example#1ArrayIterator::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());
?>