CachingIterator::hasNext

(PHP 5, PHP 7, PHP 8)

CachingIterator::hasNextCheck whether the inner iterator has a valid next element

说明

public CachingIterator::hasNext ( ) : void
Warning

本函数还未编写文档,仅有参数列表。

参数

此函数没有参数。

返回值

成功时返回 true, 或者在失败时返回 false

User Contributed Notes

andresdzphp at php dot net 26-Sep-2011 01:08
CachingIterator::hasNext Example

<?php
$ait
= new ArrayIterator(array('Value 1', 'Value 2', 'Value 3', 'Value 4'));
$cit = new CachingIterator($ait);

foreach (
$cit as $value) {
    echo
$value;
   
//if has a next value, print a comma
   
if ($cit->hasNext()) {
        echo
', ';
    }
}
?>

Result: Value 1, Value 2, Value 3, Value 4