如何正确使用PHP DOM-XML创建XML文件
我们在创建XML文件并对其进行解析时,通常都会用到
PHP DOM-XML的应用代码示例:
- ?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(" br/> br/>");
- //text node 对象
- $foo = xpath_eval($ctx, "//text");
- print_r($foo);
- print(" br/> br/>");
- // 第一个text node对象
- $foo = xpath_eval($ctx, "//text[1]");
- print_r($foo);
- print(" br/> br/>");
- // 第二个text node对象
- $foo = xpath_eval($ctx, "//text[2]");
- print_r($foo);
- print(" br/> br/>");
- // 第三个answer对象
- $foo = xpath_eval($ctx, "//answer[3]");
- print_r($foo);
- print(" br/> br/>");
- //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(" br/>");
- print($tmp[0]->type) . "; ";
- print($tmp[0]->name) . "; ";
- print($tmp[0]->content);
- ?>
需要说明,PHP DOM-XML只能在PHPPHP4.0.x + linux上运行

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