dsdt66064367 2011-08-15 09:04
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从结尾读取xml文件,在php中启动

i want to read xml file from end to start suppose my xml like that :

<note>
<to>Tove</to>
<from>Jani</from>
<heading>Reminder</heading>
<body>Don't forget me this weekend!</body>
</note>
<note>
<to>Samy</to>
<from>Jani</from>
<heading>Reminder</heading>
<body>Don't Miss me this weekend!</body>
</note>

i need to read last note first i use code like that

$x = $xmldoc->getElementsByTagName('note');
        $nofnews = $xmldoc->getElementsByTagName('note')->length;
        for ($i = 0; $i < $nofnews; $i++) {
            $item_title = $x->item($i)->getElementsByTagName('to')
                            ->item(0)->nodeValue;
            $item_link = $x->item($i)->getElementsByTagName('from')
                            ->item(0)->nodeValue;
                            }

thank you in advance

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  • duan7664 2011-08-15 09:16
    关注

    getElementsByTagName returns a DOMNodeList. You can access each element by it's numerical index (0 to length-1) as you already do, but just start at the end, not the beginning in your for loop, then count downwards:

    $x = $xmldoc->getElementsByTagName('note');
    $nofnews = $x->length;
    for ($i = $nofnews-1; $i > -1; $i--)
    {
        $item = $x->item($i);
        $item_title = $item->getElementsByTagName('to')
                            ->item(0)->nodeValue;
        $item_link = $item->getElementsByTagName('from')
                            ->item(0)->nodeValue;
    }
    

    This should already to it for you.

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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