略微加速

PHP官方手册 - 互联网笔记

PHP - Manual: SplObjectStorage::valid

2024-11-23

SplObjectStorage::valid

(PHP 5 >= 5.1.0, PHP 7, PHP 8)

SplObjectStorage::validReturns if the current iterator entry is valid

说明

public SplObjectStorage::valid(): bool

Returns if the current iterator entry is valid.

参数

此函数没有参数。

返回值

Returns true if the iterator entry is valid, false otherwise.

范例

示例 #1 SplObjectStorage::valid() example

<?php
$s 
= new SplObjectStorage();

$o1 = new StdClass;
$o2 = new StdClass;

$s->attach($o1"d1");
$s->attach($o2"d2");

$s->rewind();
while(
$s->valid()) {
    echo 
$s->key()."\n";
    
$s->next();
}
?>

以上例程的输出类似于:

0
1

参见

add a noteadd a note

User Contributed Notes

There are no user contributed notes for this page.

官方地址:https://www.php.net/manual/en/splobjectstorage.valid.php

北京半月雨文化科技有限公司.版权所有 京ICP备12026184号-3