使用PHP DOM-XML创建和解析XML文件
2024年02月25日
<?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只能在PHP PHP4.0.x+linux上运行
