xml operation class implemented by php

The example in this article describes the xml operation class implemented by PHP. Share it with everyone for your reference, the details are as follows:

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:

<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="";
 $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="";
 $this->end="$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;
 $c/n";
 return true;
}
function append_child_node($title='undefined',$c/n$contents/n']]-->$title>/n";
 }else{
 $c/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;
 }
}
}

Readers who are interested in more content related to PHP operating xml can check out the special topic of this site: "Summary of PHP operating skills for XML files"

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The above introduces the XML operation class implemented by PHP, including the relevant content. I hope it will be helpful to friends who are interested in PHP tutorials.