dtpt75860 2010-03-10 01:36
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XPath无效的表达式

<?php
  $feed = file_get_contents('http://thexmofo.wordpress.com/feed/');
  $xml = new SimpleXMLElement($feed);
  $xml->registerXPathNamespace('media', 'http://thexmofo.wordpress.com/feed/');
  $images = $xml->xpath('/rss/channel/item/media:content@url');
  var_dump($images);
?>

Can anyone tell my why I'm getting Warning: SimpleXMLElement::xpath() [simplexmlelement.xpath]: Invalid expression followed by bool(false)?

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2条回答 默认 最新

  • doudiecai1572 2010-03-10 02:31
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    That XPath expression is invalid, that much we know. Now since you didn't say what you were trying to select, all we can do is randomly guess your intentions, so here's my random guess:

    /rss/channel/item/media:content/@url
    

    ...assuming you're trying to select all the @url attributes in that feed.

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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