在 simpleXMLElement 的 foreach 循环中获取子索引

2021-12-26 00:00:00 key foreach php

这是我的php代码:

<ul><?php$xml = simplexml_load_file('post.xml');//print_r($xml);foreach($xml->item as $key=>$item ){回声<<<HTML<li><div class="已发布"><span class="day">13</span>2010 年 9 月
<div class="summary"><a href="#slide-$key"><h3>$ite​​m->title</h3></a>
HTML;}?>

php 渲染页面后， 返回 .我想要 $key 获取其中的数量，那么如何获得?

解决方案

这是因为 simpleXML 结构不是普通的数组，而是没有数组索引的迭代器.

除了使用变量手动跟踪之外，我不知道还有其他解决方案:

 $index = 0;$xml = simplexml_load_file('post.xml');foreach($xml->item 作为 $item ){....$索引++；}

<?xml version="1.0" encoding="utf-8"?>
<items>
  <item>
    <title>This is title1</title>
    <desc>This is desc1</desc>
    <image></image>
    <tudou></tudou>
  </item>
  <item>
    <title>This is title2</title>
    <desc>This is desc2</desc>
    <tudou>55362137</tudou>
  </item>
  <item>
    <title>This is title3</title>
    <desc>This is desc4</desc>
  </item>
</items>

here's my php code:

<div class="nav">
    <ul>
        <?php
                $xml = simplexml_load_file('post.xml');
                //print_r($xml);
                foreach($xml->item as $key=>$item )
                {
                    echo <<<HTML
                    <li>
                    <div class="published">
                        <span class="day">13</span>
                        Sep 2010
                    </div>

                    <div class="summary">
                    <a href="#slide-$key">
                            <h3>$item->title</h3>
                    </a>
                    </div>
                    </li>

HTML;
                }
            ?>
        </ul>
    </div>

after php render the page,the <a href="#slide-$key"> return <a href=#slide-item>. I want $key get the number of which , so how to get ?

解决方案

This is because simpleXML structures are not normal arrays but iterators who do not have an array index.

I don't know of any other solution than keeping track manually using a variable:

 $index = 0;
 $xml = simplexml_load_file('post.xml');

 foreach($xml->item as $item )
   {
       ....
       $index++;
    }

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