使用PHPDOM-XML创建和解析XML文件sdyqingdao（翻译）

<?php 
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/**
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* Topic:       Create and parse XML files using PHP DOM-XML
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* Source:      http://www.php.net/domxml
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* Reference:   http://www.zugeschaut-und-mitgebaut.de/php/extension.domxml.html
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* Author:      [email protected], 16-1-2001
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*
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*/ 
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// 使用PHP DOM-XML创建和解析XML文件
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//创建XML文档对象；以后的处理过程将在此基础上进行
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$doc = new_xmldoc("1.0" ); 
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//创建根节点，并设置一个属性
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$root = $doc->add_root("faq" ); 
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$root->setattr("page", "32" ); 
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//子节点
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$one = $root->new_child("question", ""); 
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//为子节点设置属性
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$one->setattr("number", "1"); 
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//question也创建子节点，并且给它赋值
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$one->new_child("text", "1. Where to get libxml-2.0.0?"); 
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$one->new_child("answer", "You can download the latest
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release of libxml   either as a source archive or
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RPM package from http://www.xmlsoft.org.
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The current version is libxml2-2.2.1." ); 
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$two = $root->new_child("question", "" ); 
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$two->setattr("number", "2"); 
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$two->new_child("text", "2. How to configure PHP4?" ); 
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// 创建一个不直接赋值的节点
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$twoone = $two->new_child("answer", ""); 
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// 然后给它单独赋值
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$twoone->set_content("DIR is the libxml install directory
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(if you just use --with-dom it defaults
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to /usr), I needed to use --with-dom=/usr/local" ); 
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$three = $root->new_child("question", "" ); 
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$three->setattr("number", "7" ); 
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$three->new_child("text", "7. How to use DOM XML function ?" ); 
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$three->new_child("answer", "Read this document source for
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a simple example." ); 
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//输出到Browser
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print("<pre>".htmlspecialchars($doc->dumpmem() )."</pre>" ); 
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// write to file
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//写回到文件
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$fp = fopen("test_dom.xml", "w+" ); 
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fwrite($fp, $doc->dumpmem(), strlen($doc->dumpmem() )); 
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fclose($fp); 
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// ------------------------------------------------------
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//现在使用xpath从XML文档中得到内容
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$doc = xmldoc(join("", file("test_dom.xml")) ); 
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$ctx = xpath_new_context($doc ); 
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//所有对象
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$foo = xpath_eval($ctx, "//child::*"); 
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print_r($foo); 
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print("<br/><br/>"); 
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//text node 对象
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$foo = xpath_eval($ctx, "//text"); 
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print_r($foo); 
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print("<br/><br/>"); 
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// 第一个text node对象
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$foo = xpath_eval($ctx, "//text[1]"); 
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print_r($foo); 
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print("<br/><br/>"); 
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// 第二个text node对象
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$foo = xpath_eval($ctx, "//text[2]"); 
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print_r($foo); 
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print("<br/><br/>"); 
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// 第三个answer对象
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$foo = xpath_eval($ctx, "//answer[3]"); 
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print_r($foo); 
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print("<br/><br/>"); 
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//第三个text node的类型，名称和内容
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$foo = xpath_eval($ctx, "//text[3]"); 
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$tmp = $foo->nodeset; 
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print_r($tmp); 
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print("<br/>"); 
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print($tmp[0]->type) . "; "; 
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print($tmp[0]->name) . "; "; 
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print($tmp[0]->content); 
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?> 
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需要说明，PHP DOM 只能在PHP  PHP4.0.x + linux上运行
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PHPDOM类库请到http://www.zend.com/download下载
php爱好者　站 http://www.phpfans.net 网页制作|网站建设|数据采集.