使用PHP DOM-XML创建和解析XML文件_XML/RSS教程-查字典教程网

使用PHP DOM-XML创建和解析XML文件 <?php

/**

* Topic: Create and parse XML files using PHP DOM-XML

* Source: http://www.php.net/domxml

* Reference: http://www.zugeschaut-und-mitgebaut.de/php/extension.domxml.html

* Author: urs@circle.ch, 16-1-2001

// 使用PHP DOM-XML创建和解析XML文件

//创建XML文档对象；以后的处理过程将在此基础上进行

$doc = new_xmldoc("1.0" );

//创建根节点，并设置一个属性

$root = $doc->add_root("faq" );

$root->setattr("page", "32" );

//子节点

$one = $root->new_child("question", "");

//为子节点设置属性

$one->setattr("number", "1");

//question也创建子节点，并且给它赋值

$one->new_child("text", "1. Where to get libxml-2.0.0?");

$one->new_child("answer", "You can download the latest

release of libxml either as a source archive or

RPM package from http://www.xmlsoft.org.

The current version is libxml2-2.2.1." );

$two = $root->new_child("question", "" );

$two->setattr("number", "2");

$two->new_child("text", "2. How to configure PHP4?" );

// 创建一个不直接赋值的节点

$twoone = $two->new_child("answer", "");

// 然后给它单独赋值

$twoone->set_content("DIR is the libxml install directory

(if you just use --with-dom it defaults

to /usr), I needed to use --with-dom=/usr/local" );

$three = $root->new_child("question", "" );

$three->setattr("number", "7" );

$three->new_child("text", "7. How to use DOM XML function ?" );

$three->new_child("answer", "Read this document source for

a simple example." );

//输出到Browser

print("<pre>".htmlspecialchars($doc->dumpmem() )."</pre>" );

// write to file

//写回到文件

$fp = fopen("test_dom.xml", "w+" );

fwrite($fp, $doc->dumpmem(), strlen($doc->dumpmem() ));

fclose($fp);

// ------------------------------------------------------

//现在使用xpath从XML文档中得到内容

$doc = xmldoc(join("", file("test_dom.xml")) );

$ctx = xpath_new_context($doc );

//所有对象

$foo = xpath_eval($ctx, "//child::*");

print_r($foo);

print(" ");

//text node 对象

$foo = xpath_eval($ctx, "//text");

print_r($foo);

print(" ");

// 第一个text node对象

$foo = xpath_eval($ctx, "//text[1]");

print_r($foo);

print(" ");

// 第二个text node对象

$foo = xpath_eval($ctx, "//text[2]");

print_r($foo);

print(" ");

// 第三个answer对象

$foo = xpath_eval($ctx, "//answer[3]");

print_r($foo);

print(" ");

//第三个text node的类型，名称和内容

$foo = xpath_eval($ctx, "//text[3]");

$tmp = $foo->nodeset;

print_r($tmp);

print(" ");

print($tmp[0]->type) . "; ";

print($tmp[0]->name) . "; ";

print($tmp[0]->content);

需要说明，PHP DOM 只能在PHPPHP4.0.x + linux上运行

PHPDOM类库请到http://www.zend.com/download下载