get the sub index in foreach loop in simpleXMLElem

<?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 ?

标签： php foreach key

5条回答

Luminary・发光体

2楼-- · 2020-02-12 14:01

You can use a for loop instead of a foreach like this :

$item = $xml->item;
$howMany = count($item);
for($i = 0; $i < $howMany; $i++){
echo <<<HTML
                    <li>
                    <div class="published">
                        <span class="day">13</span>
                        Sep 2010
                    </div>

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

HTML;
}

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叼着烟拽天下

3楼-- · 2020-02-12 14:06

Heredoc

might try

<a href="#slide-{$key}">

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forever°为你锁心

4楼-- · 2020-02-12 14:07

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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Deceive 欺骗

5楼-- · 2020-02-12 14:09

AFAIK with heredocs format, you need to wrap variables in curly braces:

<a href="#slide-{$key}">
  <h3>{$item->title}</h3>
</a>

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贼婆χ

6楼-- · 2020-02-12 14:25

You could use SimpleXMLElement::xpath to return an array of the <item> elements, then access the array's keys as you want.

foreach ($xml->xpath('/items/item') as $key => $item)

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get the sub index in foreach loop in simpleXMLElem

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