PHP解析xml格式数据工具类示例

本文实例讲述了PHP解析xml格式数据工具类。分享给大家供大家参考，具体如下：

class ome_xml {
  
  public $parser;
  
  public $srcenc;
  
  public $dstenc;
  
  public $_struct = array();
  
  function SofeeXmlParser($srcenc = null, $dstenc = null) {
    $this->srcenc = $srcenc;
    $this->dstenc = $dstenc;
    // initialize the variable.
    $this->parser = null;
    $this->_struct = array();
  }
  
  function xml2array($file) {
    //$this->SofeeXmlParser('utf-8');
  $data = file_get_contents($file);
    $this->parseString($data);
    return $this->getTree();
  }
  function xml3array($file){
  $data = file_get_contents($file);
  $this->parseString($data);
  return $this->_struct;
  }
  
  function parseString($data) {
    if ($this->srcenc === null) {
      $this->parser = xml_parser_create();
    } else {
      if($this->parser = xml_parser_create($this->srcenc)) {
 return 'Unable to create XML parser resource with '. $this->srcenc .' encoding.';
      }
    }
    if ($this->dstenc !== null) {
      @xml_parser_set_option($this->parser, XML_OPTION_TARGET_ENCODING, $this->dstenc) or die('Invalid target encoding');
    }
    xml_parser_set_option($this->parser, XML_OPTION_CASE_FOLDING, 0);  // lowercase tags
    xml_parser_set_option($this->parser, XML_OPTION_SKIP_WHITE, 1);    // skip empty tags
    if (!xml_parse_into_struct($this->parser, $data, $this->_struct)) {
      
      $this->free();
      return false;
    }
    $this->_count = count($this->_struct);
    $this->free();
  }
  
  function getTree() {
    $i = 0;
    $tree = array();
    $tree = $this->addNode(
      $tree,
      $this->_struct[$i]['tag'],
      (isset($this->_struct[$i]['value'])) ? $this->_struct[$i]['value'] : '',
      (isset($this->_struct[$i]['attributes'])) ? $this->_struct[$i]['attributes'] : '',
      $this->getChild($i)
    );
    unset($this->_struct);
    return $tree;
  }
  
  function getChild(&$i) {
    // contain node data
    $children = array();
    // loop
    while (++$i < $this->_count) {
      // node tag name
      $tagname = $this->_struct[$i]['tag'];
      $value = isset($this->_struct[$i]['value']) ? $this->_struct[$i]['value'] : '';
      $attributes = isset($this->_struct[$i]['attributes']) ? $this->_struct[$i]['attributes'] : '';
      switch ($this->_struct[$i]['type']) {
 case 'open':
   // node has more children
   $child = $this->getChild($i);
   // append the children data to the current node
   $children = $this->addNode($children, $tagname, $value, $attributes, $child);
   break;
 case 'complete':
   // at end of current branch
   $children = $this->addNode($children, $tagname, $value, $attributes);
   break;
 case 'cdata':
   // node has CDATA after one of it's children
   $children['value'] .= $value;
   break;
 case 'close':
   // end of node, return collected data
   return $children;
   break;
      }
    }
    //return $children;
  }
  
  function addNode($target, $key, $value = '', $attributes = '', $child = '') {
    if (!isset($target[$key]['value']) && !isset($target[$key][0])) {
      if ($child != '') {
 $target[$key] = $child;
      }
      if ($attributes != '') {
 foreach ($attributes as $k => $v) {
   $target[$key][$k] = $v;
 }
      }
      $target[$key]['value'] = $value;
    } else {
      if (!isset($target[$key][0])) {
 // is string or other
 $oldvalue = $target[$key];
 $target[$key] = array();
 $target[$key][0] = $oldvalue;
 $index = 1;
      } else {
 // is array
 $index = count($target[$key]);
      }
      if ($child != '') {
 $target[$key][$index] = $child;
      }
      if ($attributes != '') {
 foreach ($attributes as $k => $v) {
   $target[$key][$index][$k] = $v;
 }
      }
      $target[$key][$index]['value'] = $value;
    }
    return $target;
  }
  
  function free() {
    if (isset($this->parser) && is_resource($this->parser)) {
      xml_parser_free($this->parser);
      unset($this->parser);
    }
  }
}

PS：这里再为大家提供几款关于xml操作的在线工具供大家参考使用：

在线XML/JSON互相转换工具：
http://tools.jb51.net/code/xmljson

在线格式化XML/在线压缩XML：
http://tools.jb51.net/code/xmlformat

XML在线压缩/格式化工具：
http://tools.jb51.net/code/xml_format_compress

XML代码在线格式化美化工具：
http://tools.jb51.net/code/xmlcodeformat

更多关于PHP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》、《PHP数组(Array)操作技巧大全》、《php字符串(string)用法总结》、《PHP错误与异常处理方法总结》、《PHP基本语法入门教程》、《php面向对象程序设计入门教程》、《php+mysql数据库操作入门教程》及《php常见数据库操作技巧汇总》

希望本文所述对大家PHP程序设计有所帮助。