php实现的xml操作类

本文实例讲述了php实现的xml操作类。分享给大家供大家参考，具体如下：
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									<?php

									/*

									使用方法:

									$test=new xml();

									$test->new_xml('test.xml');

									$test->root('document');

									$test->append_root_node('book');

									$test->append_child_node('author','linage');

									$test->append_child_node('page',100);

									$test->append_child_node('money','35 RMB');

									$test->append_root_node_end();

									$test->append_root_node('book','name','The"Web"Servers');

									$test->append_child_node('a u t ho"r','li n a g e');

									$test->append_child_node('page',100);

									$test->append_child_node('money','35 RMB');

									$test->append_root_node_end();

									$test->display();

									$test->save();

									生成的xml结果:

									<?xml version="1.0" encoding="utf-8"?>

									<document>

									<book>

									<author>linage</author>

									<page>100</page>

									<money>35 RMB</money>

									</book>

									<book name="TheWebServers">

									<author>li n a g e</author>

									<page>100</page>

									<money>35 RMB</money>

									</book>

									</document>

									*/

									class xml{

									var $version;

									var $encoding;

									var $start;

									var $end;

									var $filename;

									var $xml_document;

									var $root_start;

									var $root_end;

									var $rss_start;

									var $rss_end;

									function xml($ver='1.0',$encoding='GB2312'){

									 $this->version="<?xml version=/"{$ver}/" encoding=/"{$encoding}/" standalone=/"yes/" ?>";

									 $this->rss_start="<rss version=/"2.0/" xmlns:domxml=/"[url]http://xml.666life.com/rss/1.0[/url]/" xmlns:geo=/"[url]http://www.w3.org/2003/01/geo/wgs84_pos#[/url]/">";

									 $this->rss_end="</rss>";

									}

									function new_xml($filename){

									 $this->filename=$filename;

									 return true;

									}

									function root($element){

									 $element=$this->filter($element);

									 if(isset($this->start) and isset($this->end)){

									 exit("error:Only one top level element is allowed in an XML document./r/n");

									 }else{

									 $this->start="<$element>";

									 $this->end="</$element>";

									 $this->xml_document=$this->version."/n".$this->rss_start."/n".$this->start."/n";

									 return true;

									 }

									}

									function append_root_node($title,$property=null,$pro_val=null){

									 $title=$this->filter($title);

									 $property=$this->filter($property);

									 $pro_val=$this->filter($pro_val);

									 $property!=null?$pro_str=" $property=/"$pro_val/"":$property=null;

									 $contents="<{$title}{$pro_str}>/n";

									 $this->xml_document.=$contents;

									 $this->root_end="</$title>";

									 return true;

									}

									function append_root_node_end(){

									 $this->xml_document.=$this->root_end."/n";

									 return true;

									}

									function append_child_node($title='undefined',$contents='undefined',$property=null,$pro_val=null,$cddate=false){

									 isset($property)?$pro_str=" $property=/"$pro_val/"":$property=null;

									 $title=$this->filter($title);

									 $contents=$this->filter($contents,false);

									 $property=$this->filter($property);

									 $pro_val=$this->filter($pro_val);

									 $cddate===false?$cddate=false:$cddate=true;

									 if($cddate){

									 $contents="<{$title}{$pro_str}><!--[CDATA['/n$contents/n']]--></$title>/n";

									 }else{

									 $contents="<{$title}{$pro_str}>$contents</$title>";

									 }

									 $this->xml_document.=$contents."/n";

									 return true;

									}

									function display(){

									 header("Content-type: text/xml");

									 $xml=$this->xml_document.$this->end."/n".$this->rss_end;

									 echo $xml;

									 //return true;

									}

									function filter($sring,$replace_null=true){

									 $filter[]='"';

									 $filter[]="//";

									 $filter[]="/n";

									 $filter[]="/r";

									 $filter[]="/t";

									 $replace_null===true?$filter[]=" ":$replace_null=false;

									 foreach ($filter as $val){

									 $sring=str_replace($val,'',$sring);

									 }

									 return $sring;

									}

									function encode(){

									 //you can add the convert encode function here or add other class to do that

									}

									function save(){

									 $this->xml_document=$this->xml_document.$this->end."/n".$this->rss_end;

									 $handle=fopen($this->filename,'wb+');

									 $result=fwrite($handle,$this->xml_document);

									 fclose($handle);

									 if($result){

									 return true;

									 }else{

									 echo "error:can't write to files,maybe the access denied.try to chmod 777 the directory?";

									 return false;

									 }

									}

									}
希望本文所述对大家PHP程序设计有所帮助。
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