Deprecated: Optional parameter $keys declared before required parameter $cms_id is implicitly treated as a required parameter in /home/www/dev/work/class/blog/CmsKey.php on line 75

Deprecated: Creation of dynamic property lvesu\lvesu\controller\blog\php::$title is deprecated in /home/www/dev/work/website/lvesu/class/controller/blog/php.php on line 28

Deprecated: Creation of dynamic property lvesu\lvesu\controller\blog\php::$outlink is deprecated in /home/www/dev/work/website/lvesu/template/blog/cms/php.manual.tpl on line 2

Deprecated: Creation of dynamic property lvesu\lvesu\controller\blog\php::$status is deprecated in /home/www/dev/work/website/lvesu/template/blog/index.head.php on line 2
PHP - Manual: SimpleXMLIterator::key - 互联网笔记

略微加速

PHP官方手册 - 互联网笔记

PHP - Manual: SimpleXMLIterator::key

2025-07-12

SimpleXMLIterator::key

(PHP 5, PHP 7, PHP 8)

SimpleXMLIterator::keyReturn current key

说明

public SimpleXMLIterator::key(): mixed

This method gets the XML tag name of the current element.

参数

此函数没有参数。

返回值

Returns the XML tag name of the element referenced by the current SimpleXMLIterator object or false

范例

示例 #1 Get the current XML tag key

<?php
$xmlIterator 
= new SimpleXMLIterator('<books><book>PHP basics</book><book>XML basics</book></books>');

echo 
var_dump($xmlIterator->key());
$xmlIterator->rewind(); // rewind to the first element
echo var_dump($xmlIterator->key());

?>

以上例程会输出:

bool(false)
string(4) "book"
add a noteadd a note

User Contributed Notes 1 note

up
3
bmafzallmahmud at gmail dot com
4 years ago
<?php
$note
=<<<XML
<note>
<to>Tove</to>
<from>Jani</from>
<heading>Reminder</heading>
<body>Don't forget me this weekend!</body>
</note>
XML;

$xmlIterator = new SimpleXMLIterator($note);
for(
$xmlIterator->rewind(); $xmlIterator->valid(); $xmlIterator->next() ) {
      echo
"<pre>";
     echo
var_dump($xmlIterator->key());

}
?>
out put :
string(2) "to"
string(4) "from"
string(7) "heading"
string(4) "body"

官方地址:https://www.php.net/manual/en/simplexmliterator.key.php

冷却塔厂家 广告
中文GPT4.0无需注册 广告
北京半月雨文化科技有限公司.版权所有 京ICP备12026184号-3