时间:2021-07-01 10:21:17 帮助过:7人阅读
<? /************************************************ ** use XML in PHP5 ** reference site: ** http://cn.php.com/manual/zh/ref.dom.php ** the follow codes need PHP5 support *************************************************/ //首先要创建一个DOMDocument对象 $dom = new DomDocument(); //然后载入XML文件 $dom -> load("test.xml"); //输出XML文件 //header("Content-type: text/xml;charset=gb2312"); //echo $dom -> saveXML(); //保存XML文件,返回值为int(文件大小,以字节为单位) //$dom -> save("newfile.xml"); echo "<hr/>取得所有的title元素:<hr/>"; $titles = $dom -> getElementsByTagName("title"); foreach ($titles as $node){ echo $node -> textContent . "<br/>"; //这样也可以 //echo $node->firstChild->data . "<br/>"; } /* echo "<hr/>从根结点遍历所有结点:<br/>"; foreach ($dom->documentElement->childNodes as $items) { //如果节点是一个元素(nodeType == 1)并且名字是item就继续循环 if ($items->nodeType == 1 && $items->nodeName == "item") { foreach ($items->childNodes as $titles) { //如果节点是一个元素,并且名字是title就打印它. if ($titles->nodeType == 1 && $titles->nodeName == "title") { print $titles->textContent . "\n"; } } } } */ //使用XPath查询数据 echo "<hr/>使用XPath查询的title节点结果:<hr/>"; $xpath = new domxpath($dom); $titles = $xpath->query("/rss/channel/item/title"); foreach ($titles as $node){ echo $node->textContent."<br/>"; } /* 这样和使用getElementsByTagName()方法差不多,但是Xpath要强大的多 深入一点可能是这样: /rss/channel/item[position() = 1]/title 返回第一个item元素的所有 /rss/channel/item/title[@id = '23'] 返回所有含有id属性并且值为23的title /rss/channel/&folder&/title 返回所有articles元素下面的title(译者注:&folder&代表目录深度) */ //向DOM中写入新数据 $item = $dom->createElement("item"); $title = $dom->createElement("title"); $titleText = $dom->createTextNode("title text"); $title->appendChild($titleText); $item->appendChild($title); $dom->documentElement->getElementsByTagName('channel')->item(0)->appendChild($item); //从DOM中删除节点 //$dom->documentElement->RemoveChild($dom->documentElement->getElementsByTagName("channel")->item(0)); //或者使用xpath查询出节点再删除 //$dom->documentElement->RemoveChild($xpath->query("/rss/channel")->item(0)); //$dom->save("newfile.xml"); //从DOM中修改节点数据 //修改第一个title的文件 //这个地方比较笨,新创建一个节点,然后替换旧的节点。如果哪位朋友有其他好的方法请一定要告诉我 $firstTitle = $xpath->query("/rss/channel/item/title")->item(0); $newTitle = $dom->createElement("title"); $newTitle->appendChild(new DOMText("This's the new title text!!!")); $firstTitle->parentNode->replaceChild($newTitle, $firstTitle); //修改属性 //$firstTitle = $xpath->query("/rss/channel/item/title")->item(0); //$firstTitle->setAttribute("orderby", "4"); $dom->save("newfile.xml"); echo "<hr/><a href=\"newfile.xml\">查看newfile.xml</a>"; //下面的代码获得并解析php.com的首页,将返第一个title元素的内容。 /* $dom->loadHTMLFile("http://www.php.com/"); $title = $dom->getElementsByTagName("title"); print $title->item(0)->textContent; */ ?>
下面是test.xml文件代码:
<?xml version="1.0" encoding="gb2312"?> <rss version="2.0"> <channel> <title>javascript</title> <link>http://blog.csdn.net/zhongmao/category/29515.aspx</link> <description>javascript</description> <language>zh-chs</language> <generator>.text version 0.958.2004.2001</generator> <item> <creator>zhongmao</creator> <title orderby="1">out put excel used javascript</title> <link>http://blog.csdn.net/zhongmao/archive/2004/09/15/105385.aspx</link> <pubdate>wed, 15 sep 2004 13:32:00 gmt</pubdate> <guid>http://blog.csdn.net/zhongmao/archive/2004/09/15/105385.aspx</guid> <comment>http://blog.csdn.net/zhongmao/comments/105385.aspx</comment> <comments>http://blog.csdn.net/zhongmao/archive/2004/09/15/105385.aspx#feedback</comments> <comments>2</comments> <commentrss>http://blog.csdn.net/zhongmao/comments/commentrss/105385.aspx</commentrss> <ping>http://blog.csdn.net/zhongmao/services/trackbacks/105385.aspx</ping> <description>test description</description> </item> <item> <creator>zhongmao</creator> <title orderby="2">out put word used javascript</title> <link>http://blog.csdn.net/zhongmao/archive/2004/08/06/67161.aspx</link> <pubdate>fri, 06 aug 2004 16:33:00 gmt</pubdate> <guid>http://blog.csdn.net/zhongmao/archive/2004/08/06/67161.aspx</guid> <comment>http://blog.csdn.net/zhongmao/comments/67161.aspx</comment> <comments>http://blog.csdn.net/zhongmao/archive/2004/08/06/67161.aspx#feedback</comments> <comments>0</comments> <commentrss>http://blog.csdn.net/zhongmao/comments/commentrss/67161.aspx</commentrss> <ping>http://blog.csdn.net/zhongmao/services/trackbacks/67161.aspx</ping> <description>test word description</description> </item> <item> <creator>zhongmao</creator> <title orderby="3">xmlhttp</title> <link>http://blog.csdn.net/zhongmao/archive/2004/08/02/58417.aspx</link> <pubdate>mon, 02 aug 2004 10:11:00 gmt</pubdate> <guid>http://blog.csdn.net/zhongmao/archive/2004/08/02/58417.aspx</guid> <comment>http://blog.csdn.net/zhongmao/comments/58417.aspx</comment> <comments>http://blog.csdn.net/zhongmao/archive/2004/08/02/58417.aspx#feedback</comments> <comments>0</comments> <commentrss>http://blog.csdn.net/zhongmao/comments/commentrss/58417.aspx</commentrss> <ping>http://blog.csdn.net/zhongmao/services/trackbacks/58417.aspx</ping> <description>xmlhttpaaa asd bb cc dd</description> </item> </channel> </rss>
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