如何正确使用PHP DOM-XML创建XML文件_PHP教程-php教程-PHP中文网

如何正确使用PHP DOM-XML创建XML文件_PHP教程

WBOY

发布： 2016-07-15 13:31:55

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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