php的XML文件解释类应用实例

<?php 
/** xml 文件分析类 
*  date:  2013-02-01 
*  author: fdipzone 
*  ver:  1.0 
* 
*  func: 
*  loadxmlfile($xmlfile)   读入xml文件输出array 
*  loadxmlstring($xmlstring) 读入xmlstring 输出array 
*/ 
 
class xmlparser{ 
 
  /** 读取xml文件 
  * @param string $xmlfile 
  * @return array 
  */ 
  public function loadxmlfile($xmlfile){ 
    // get xmlfile content 
    $xmlstring = file_exists($xmlfile)? file_get_contents($xmlfile) : ''; 
    // parser xml 
    list($flag, $data) = $this->parser($xmlstring); 
    return $this->response($flag, $data); 
  } 
 
  /** 读取xmlstring 
  * @param string $xmlstring 
  * @return array 
  */ 
  public function loadxmlstring($xmlstring){ 
    // parser xml 
    list($flag, $data) = $this->parser($xmlstring); 
    return $this->response($flag, $data); 
  } 
 
  /** 解释xml内容 
  * @param  string $xmlstring 
  * @return array 
  */ 
  private function parser($xmlstring){ 
    $flag = false; 
    $data = array(); 
    // check xml format 
    if($this->checkxmlformat($xmlstring)){ 
      $flag = true; 
      // xml to object 
      $data = simplexml_load_string($xmlstring, 'simplexmlelement', libxml_nocdata); 
      // object to array 
      $this->objecttoarray($data); 
    } 
    return array($flag, $data); 
  } 
 
  /** 检查xml格式是否正确 
  * @param string $xmlstring 
  * @return boolean 
  */ 
  private function checkxmlformat($xmlstring){ 
    if($xmlstring==''){ 
      return false; 
    } 
    $xml_parser_obj = xml_parser_create(); 
 
    if(xml_parse_into_struct($xml_parser_obj, $xmlstring, $vals, $indexs)===1){ // 1:success 0:fail 
      return true; 
    }else{ 
      return false; 
    } 
  } 
 
  /** object 转 array 
  * @param object $object 
  * @return array 
  */ 
  private function objecttoarray(&$object){ 
     
    $object = (array)$object; 
     
    foreach($object as $key => $value){ 
      if($value==''){ 
        $object[$key] = ""; 
      }else{ 
        if(is_object($value) || is_array($value)){ 
          $this->objecttoarray($value); 
          $object[$key] = $value; 
        } 
      } 
    } 
  } 
 
  /** 输出返回 
  * @param boolean $flag true:false 
  * @param array  $data 转换后的数据 
  * @return array 
  */ 
  private function response($flag=false, $data=array()){ 
    return array($flag, $data); 
  } 
} 
?>

<?php 
require "xmlparser.class.php"; 
 
$xmlfile = 'file.xml'; 
$xmlstring = '<?xml version="1.0" encoding="utf-8"?> 
<xmlroot> 
<status>1000</status> 
<info></info> 
<result><id>100</id> 
<name>fdipzone</name> 
<gender>1</gender> 
<age>28</age> 
</result> 
</xmlroot>'; 
echo '<pre>'; 
$xml_parser = new xmlparser(); 
echo "response xmlfilern"; 
list($flag, $xmldata) = $xml_parser->loadxmlfile($xmlfile); 
if($flag){ 
  print_r($xmldata); 
} 
echo "response xmlstringrn"; 
list($flag, $xmldata) = $xml_parser->loadxmlstring($xmlstring); 
if($flag){ 
  print_r($xmldata); 
} 
echo '</pre>'; 
?>