php实现的xml操作类

<?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"?>


linage
100
35 RMB


li n a g e
100
35 RMB


*/
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}/" standal/" ?>";
 $this->rss_start="";
 $this->rss_end="";
}
function new_xml($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="";
 $this->xml_document=$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']]-->/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;
 }
}
}

更多关于PHP操作xml相关内容感兴趣的读者可查看本站专题：《PHP针对XML文件操作技巧总结》

希望本文所述对大家PHP程序设计有所帮助。

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