<?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;
 }
}
}